1# 显示设备属性<a name="ZH-CN_TOPIC_0000001209787985"></a> 2 3> **说明：** 4>从 API Version 7 开始支持。 5 6## 导入模块<a name="zh-cn_topic_0000001163727614_s56d19203690d4782bfc74069abb6bd71"></a> 7 8``` 9import display from '@ohos.display'; 10``` 11 12## 权限列表<a name="zh-cn_topic_0000001163727614_section11257113618419"></a> 13 14无 15 16## DisplayState<a name="zh-cn_topic_0000001163727614_section099619567453"></a> 17 18用于表示显示设备的状态。 19 20<a name="zh-cn_topic_0000001163727614_table20633101642315"></a> 21<table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row663331618238"><th class="cellrowborder" valign="top" width="27.900000000000002%" id="mcps1.1.4.1.1"><p id="zh-cn_topic_0000001163727614_a3d0fc780cc904c1cbab7991251622f65"><a name="zh-cn_topic_0000001163727614_a3d0fc780cc904c1cbab7991251622f65"></a><a name="zh-cn_topic_0000001163727614_a3d0fc780cc904c1cbab7991251622f65"></a>名称</p> 22</th> 23<th class="cellrowborder" valign="top" width="12.43%" id="mcps1.1.4.1.2"><p id="zh-cn_topic_0000001163727614_aace9cae4ba0d4939bfa048460f61c3c7"><a name="zh-cn_topic_0000001163727614_aace9cae4ba0d4939bfa048460f61c3c7"></a><a name="zh-cn_topic_0000001163727614_aace9cae4ba0d4939bfa048460f61c3c7"></a>默认值</p> 24</th> 25<th class="cellrowborder" valign="top" width="59.67%" id="mcps1.1.4.1.3"><p id="zh-cn_topic_0000001163727614_afec895de33f94e3c87ee7acc20190a17"><a name="zh-cn_topic_0000001163727614_afec895de33f94e3c87ee7acc20190a17"></a><a name="zh-cn_topic_0000001163727614_afec895de33f94e3c87ee7acc20190a17"></a>说明</p> 26</th> 27</tr> 28</thead> 29<tbody><tr id="zh-cn_topic_0000001163727614_row188481425182510"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p52851329122117"><a name="zh-cn_topic_0000001163727614_p52851329122117"></a><a name="zh-cn_topic_0000001163727614_p52851329122117"></a>STATE_UNKNOWN</p> 30</td> 31<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p2282152962115"><a name="zh-cn_topic_0000001163727614_p2282152962115"></a><a name="zh-cn_topic_0000001163727614_p2282152962115"></a>0</p> 32</td> 33<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p328012293211"><a name="zh-cn_topic_0000001163727614_p328012293211"></a><a name="zh-cn_topic_0000001163727614_p328012293211"></a>表示显示设备状态未知。</p> 34</td> 35</tr> 36<tr id="zh-cn_topic_0000001163727614_row9573466526"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p1657317665219"><a name="zh-cn_topic_0000001163727614_p1657317665219"></a><a name="zh-cn_topic_0000001163727614_p1657317665219"></a>STATE_OFF</p> 37</td> 38<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p457396175219"><a name="zh-cn_topic_0000001163727614_p457396175219"></a><a name="zh-cn_topic_0000001163727614_p457396175219"></a>1</p> 39</td> 40<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p195734655215"><a name="zh-cn_topic_0000001163727614_p195734655215"></a><a name="zh-cn_topic_0000001163727614_p195734655215"></a>表示显示设备状态为关闭。</p> 41</td> 42</tr> 43<tr id="zh-cn_topic_0000001163727614_row594210615212"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p1194218685216"><a name="zh-cn_topic_0000001163727614_p1194218685216"></a><a name="zh-cn_topic_0000001163727614_p1194218685216"></a>STATE_ON</p> 44</td> 45<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p99429655216"><a name="zh-cn_topic_0000001163727614_p99429655216"></a><a name="zh-cn_topic_0000001163727614_p99429655216"></a>2</p> 46</td> 47<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p994212610529"><a name="zh-cn_topic_0000001163727614_p994212610529"></a><a name="zh-cn_topic_0000001163727614_p994212610529"></a>表示显示设备状态为开启。</p> 48</td> 49</tr> 50<tr id="zh-cn_topic_0000001163727614_row1126914795219"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p526907135217"><a name="zh-cn_topic_0000001163727614_p526907135217"></a><a name="zh-cn_topic_0000001163727614_p526907135217"></a>STATE_DOZE</p> 51</td> 52<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p172697710521"><a name="zh-cn_topic_0000001163727614_p172697710521"></a><a name="zh-cn_topic_0000001163727614_p172697710521"></a>3</p> 53</td> 54<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p2269207135212"><a name="zh-cn_topic_0000001163727614_p2269207135212"></a><a name="zh-cn_topic_0000001163727614_p2269207135212"></a>表示显示设备为低电耗模式。</p> 55</td> 56</tr> 57<tr id="zh-cn_topic_0000001163727614_row9269113311527"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p13269133315527"><a name="zh-cn_topic_0000001163727614_p13269133315527"></a><a name="zh-cn_topic_0000001163727614_p13269133315527"></a>STATE_DOZE_SUSPEND</p> 58</td> 59<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p3269133315527"><a name="zh-cn_topic_0000001163727614_p3269133315527"></a><a name="zh-cn_topic_0000001163727614_p3269133315527"></a>4</p> 60</td> 61<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p18269153355217"><a name="zh-cn_topic_0000001163727614_p18269153355217"></a><a name="zh-cn_topic_0000001163727614_p18269153355217"></a>表示显示设备为睡眠模式，CPU为挂起状态 。</p> 62</td> 63</tr> 64<tr id="zh-cn_topic_0000001163727614_row0461622112513"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p12106173918219"><a name="zh-cn_topic_0000001163727614_p12106173918219"></a><a name="zh-cn_topic_0000001163727614_p12106173918219"></a>STATE_VR</p> 65</td> 66<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p1310553911218"><a name="zh-cn_topic_0000001163727614_p1310553911218"></a><a name="zh-cn_topic_0000001163727614_p1310553911218"></a>5</p> 67</td> 68<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p15865395215"><a name="zh-cn_topic_0000001163727614_p15865395215"></a><a name="zh-cn_topic_0000001163727614_p15865395215"></a>表示显示设备为VR模式。</p> 69</td> 70</tr> 71<tr id="zh-cn_topic_0000001163727614_row119663437528"><td class="cellrowborder" valign="top" width="27.900000000000002%" headers="mcps1.1.4.1.1 "><p id="zh-cn_topic_0000001163727614_p119671435520"><a name="zh-cn_topic_0000001163727614_p119671435520"></a><a name="zh-cn_topic_0000001163727614_p119671435520"></a>STATE_ON_SUSPEND</p> 72</td> 73<td class="cellrowborder" valign="top" width="12.43%" headers="mcps1.1.4.1.2 "><p id="zh-cn_topic_0000001163727614_p0967144325219"><a name="zh-cn_topic_0000001163727614_p0967144325219"></a><a name="zh-cn_topic_0000001163727614_p0967144325219"></a>6</p> 74</td> 75<td class="cellrowborder" valign="top" width="59.67%" headers="mcps1.1.4.1.3 "><p id="zh-cn_topic_0000001163727614_p396720433521"><a name="zh-cn_topic_0000001163727614_p396720433521"></a><a name="zh-cn_topic_0000001163727614_p396720433521"></a>表示显示设备为开启状态，CPU为挂起状态。</p> 76</td> 77</tr> 78</tbody> 79</table> 80 81## Display<a name="zh-cn_topic_0000001163727614_section12882825611"></a> 82 83描述display对象的属性。 84 85### 属性<a name="zh-cn_topic_0000001163727614_section1059684317312"></a> 86 87<a name="zh-cn_topic_0000001163727614_table1459620431636"></a> 88<table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row25971143435"><th class="cellrowborder" valign="top" width="17.73%" id="mcps1.1.6.1.1"><p id="zh-cn_topic_0000001163727614_p1559716434320"><a name="zh-cn_topic_0000001163727614_p1559716434320"></a><a name="zh-cn_topic_0000001163727614_p1559716434320"></a>名称</p> 89</th> 90<th class="cellrowborder" valign="top" width="24.6%" id="mcps1.1.6.1.2"><p id="zh-cn_topic_0000001163727614_p3597743539"><a name="zh-cn_topic_0000001163727614_p3597743539"></a><a name="zh-cn_topic_0000001163727614_p3597743539"></a>参数类型</p> 91</th> 92<th class="cellrowborder" valign="top" width="10.549999999999999%" id="mcps1.1.6.1.3"><p id="zh-cn_topic_0000001163727614_p15971343131"><a name="zh-cn_topic_0000001163727614_p15971343131"></a><a name="zh-cn_topic_0000001163727614_p15971343131"></a>可读</p> 93</th> 94<th class="cellrowborder" valign="top" width="9.34%" id="mcps1.1.6.1.4"><p id="zh-cn_topic_0000001163727614_p1459715436311"><a name="zh-cn_topic_0000001163727614_p1459715436311"></a><a name="zh-cn_topic_0000001163727614_p1459715436311"></a>可写</p> 95</th> 96<th class="cellrowborder" valign="top" width="37.78%" id="mcps1.1.6.1.5"><p id="zh-cn_topic_0000001163727614_p75975439316"><a name="zh-cn_topic_0000001163727614_p75975439316"></a><a name="zh-cn_topic_0000001163727614_p75975439316"></a>说明</p> 97</th> 98</tr> 99</thead> 100<tbody><tr id="zh-cn_topic_0000001163727614_row95971943839"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p85976431431"><a name="zh-cn_topic_0000001163727614_p85976431431"></a><a name="zh-cn_topic_0000001163727614_p85976431431"></a>id</p> 101</td> 102<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p2059710431030"><a name="zh-cn_topic_0000001163727614_p2059710431030"></a><a name="zh-cn_topic_0000001163727614_p2059710431030"></a>number</p> 103</td> 104<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p1059711439317"><a name="zh-cn_topic_0000001163727614_p1059711439317"></a><a name="zh-cn_topic_0000001163727614_p1059711439317"></a>是</p> 105</td> 106<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p659715430317"><a name="zh-cn_topic_0000001163727614_p659715430317"></a><a name="zh-cn_topic_0000001163727614_p659715430317"></a>否</p> 107</td> 108<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p2059719436313"><a name="zh-cn_topic_0000001163727614_p2059719436313"></a><a name="zh-cn_topic_0000001163727614_p2059719436313"></a>显示设备的id号。</p> 109</td> 110</tr> 111<tr id="zh-cn_topic_0000001163727614_row457515412419"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p185751494115"><a name="zh-cn_topic_0000001163727614_p185751494115"></a><a name="zh-cn_topic_0000001163727614_p185751494115"></a>name</p> 112</td> 113<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p1575174134114"><a name="zh-cn_topic_0000001163727614_p1575174134114"></a><a name="zh-cn_topic_0000001163727614_p1575174134114"></a>string</p> 114</td> 115<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p85757417416"><a name="zh-cn_topic_0000001163727614_p85757417416"></a><a name="zh-cn_topic_0000001163727614_p85757417416"></a>是</p> 116</td> 117<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p115751144412"><a name="zh-cn_topic_0000001163727614_p115751144412"></a><a name="zh-cn_topic_0000001163727614_p115751144412"></a>否</p> 118</td> 119<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p165751447416"><a name="zh-cn_topic_0000001163727614_p165751447416"></a><a name="zh-cn_topic_0000001163727614_p165751447416"></a>显示设备的名称。</p> 120</td> 121</tr> 122<tr id="zh-cn_topic_0000001163727614_row179143454114"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p19144416411"><a name="zh-cn_topic_0000001163727614_p19144416411"></a><a name="zh-cn_topic_0000001163727614_p19144416411"></a>alive</p> 123</td> 124<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p7914541418"><a name="zh-cn_topic_0000001163727614_p7914541418"></a><a name="zh-cn_topic_0000001163727614_p7914541418"></a>boolean</p> 125</td> 126<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p1991420434110"><a name="zh-cn_topic_0000001163727614_p1991420434110"></a><a name="zh-cn_topic_0000001163727614_p1991420434110"></a>是</p> 127</td> 128<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p791411411418"><a name="zh-cn_topic_0000001163727614_p791411411418"></a><a name="zh-cn_topic_0000001163727614_p791411411418"></a>否</p> 129</td> 130<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p99144412415"><a name="zh-cn_topic_0000001163727614_p99144412415"></a><a name="zh-cn_topic_0000001163727614_p99144412415"></a>显示设备是否启用。</p> 131</td> 132</tr> 133<tr id="zh-cn_topic_0000001163727614_row102142520415"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p52142514414"><a name="zh-cn_topic_0000001163727614_p52142514414"></a><a name="zh-cn_topic_0000001163727614_p52142514414"></a>state</p> 134</td> 135<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p142142564116"><a name="zh-cn_topic_0000001163727614_p142142564116"></a><a name="zh-cn_topic_0000001163727614_p142142564116"></a><a href="#zh-cn_topic_0000001163727614_section099619567453">DisplayState</a></p> 136</td> 137<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p7215195164110"><a name="zh-cn_topic_0000001163727614_p7215195164110"></a><a name="zh-cn_topic_0000001163727614_p7215195164110"></a>是</p> 138</td> 139<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p821510515418"><a name="zh-cn_topic_0000001163727614_p821510515418"></a><a name="zh-cn_topic_0000001163727614_p821510515418"></a>否</p> 140</td> 141<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p102153564110"><a name="zh-cn_topic_0000001163727614_p102153564110"></a><a name="zh-cn_topic_0000001163727614_p102153564110"></a>显示设备的状态。</p> 142</td> 143</tr> 144<tr id="zh-cn_topic_0000001163727614_row5472125204114"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p184722514117"><a name="zh-cn_topic_0000001163727614_p184722514117"></a><a name="zh-cn_topic_0000001163727614_p184722514117"></a>refreshRate</p> 145</td> 146<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p1547215544112"><a name="zh-cn_topic_0000001163727614_p1547215544112"></a><a name="zh-cn_topic_0000001163727614_p1547215544112"></a>number</p> 147</td> 148<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p74726515410"><a name="zh-cn_topic_0000001163727614_p74726515410"></a><a name="zh-cn_topic_0000001163727614_p74726515410"></a>是</p> 149</td> 150<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p1947355194112"><a name="zh-cn_topic_0000001163727614_p1947355194112"></a><a name="zh-cn_topic_0000001163727614_p1947355194112"></a>否</p> 151</td> 152<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p647315520412"><a name="zh-cn_topic_0000001163727614_p647315520412"></a><a name="zh-cn_topic_0000001163727614_p647315520412"></a>显示设备的刷新率。</p> 153</td> 154</tr> 155<tr id="zh-cn_topic_0000001163727614_row1968020524118"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p1968005184118"><a name="zh-cn_topic_0000001163727614_p1968005184118"></a><a name="zh-cn_topic_0000001163727614_p1968005184118"></a>rotation</p> 156</td> 157<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p116804584113"><a name="zh-cn_topic_0000001163727614_p116804584113"></a><a name="zh-cn_topic_0000001163727614_p116804584113"></a>number</p> 158</td> 159<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p668013504119"><a name="zh-cn_topic_0000001163727614_p668013504119"></a><a name="zh-cn_topic_0000001163727614_p668013504119"></a>是</p> 160</td> 161<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p10680156412"><a name="zh-cn_topic_0000001163727614_p10680156412"></a><a name="zh-cn_topic_0000001163727614_p10680156412"></a>否</p> 162</td> 163<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p16808514113"><a name="zh-cn_topic_0000001163727614_p16808514113"></a><a name="zh-cn_topic_0000001163727614_p16808514113"></a>显示设备的屏幕旋转角度。</p> 164</td> 165</tr> 166<tr id="zh-cn_topic_0000001163727614_row164425664116"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p1744216134115"><a name="zh-cn_topic_0000001163727614_p1744216134115"></a><a name="zh-cn_topic_0000001163727614_p1744216134115"></a>width</p> 167</td> 168<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p0442126194115"><a name="zh-cn_topic_0000001163727614_p0442126194115"></a><a name="zh-cn_topic_0000001163727614_p0442126194115"></a>number</p> 169</td> 170<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p1444212614110"><a name="zh-cn_topic_0000001163727614_p1444212614110"></a><a name="zh-cn_topic_0000001163727614_p1444212614110"></a>是</p> 171</td> 172<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p2044286124115"><a name="zh-cn_topic_0000001163727614_p2044286124115"></a><a name="zh-cn_topic_0000001163727614_p2044286124115"></a>否</p> 173</td> 174<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p1544266184119"><a name="zh-cn_topic_0000001163727614_p1544266184119"></a><a name="zh-cn_topic_0000001163727614_p1544266184119"></a>显示设备的宽度，单位为像素。</p> 175</td> 176</tr> 177<tr id="zh-cn_topic_0000001163727614_row1764911684115"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p164916610417"><a name="zh-cn_topic_0000001163727614_p164916610417"></a><a name="zh-cn_topic_0000001163727614_p164916610417"></a>height</p> 178</td> 179<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p164906174116"><a name="zh-cn_topic_0000001163727614_p164906174116"></a><a name="zh-cn_topic_0000001163727614_p164906174116"></a>number</p> 180</td> 181<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p136492624113"><a name="zh-cn_topic_0000001163727614_p136492624113"></a><a name="zh-cn_topic_0000001163727614_p136492624113"></a>是</p> 182</td> 183<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p12649660417"><a name="zh-cn_topic_0000001163727614_p12649660417"></a><a name="zh-cn_topic_0000001163727614_p12649660417"></a>否</p> 184</td> 185<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p126490694117"><a name="zh-cn_topic_0000001163727614_p126490694117"></a><a name="zh-cn_topic_0000001163727614_p126490694117"></a>显示设备的高度，单位为像素。</p> 186</td> 187</tr> 188<tr id="zh-cn_topic_0000001163727614_row0814166164118"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p1081413694118"><a name="zh-cn_topic_0000001163727614_p1081413694118"></a><a name="zh-cn_topic_0000001163727614_p1081413694118"></a>densityDPI</p> 189</td> 190<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p88142654116"><a name="zh-cn_topic_0000001163727614_p88142654116"></a><a name="zh-cn_topic_0000001163727614_p88142654116"></a>number</p> 191</td> 192<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p1081415654114"><a name="zh-cn_topic_0000001163727614_p1081415654114"></a><a name="zh-cn_topic_0000001163727614_p1081415654114"></a>是</p> 193</td> 194<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p481466164119"><a name="zh-cn_topic_0000001163727614_p481466164119"></a><a name="zh-cn_topic_0000001163727614_p481466164119"></a>否</p> 195</td> 196<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p29318812312"><a name="zh-cn_topic_0000001163727614_p29318812312"></a><a name="zh-cn_topic_0000001163727614_p29318812312"></a>显示设备的屏幕密度，单位为DPI。</p> 197</td> 198</tr> 199<tr id="zh-cn_topic_0000001163727614_row1022157124119"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p422576414"><a name="zh-cn_topic_0000001163727614_p422576414"></a><a name="zh-cn_topic_0000001163727614_p422576414"></a>densityPixels</p> 200</td> 201<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p72220724116"><a name="zh-cn_topic_0000001163727614_p72220724116"></a><a name="zh-cn_topic_0000001163727614_p72220724116"></a>number</p> 202</td> 203<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p1822677418"><a name="zh-cn_topic_0000001163727614_p1822677418"></a><a name="zh-cn_topic_0000001163727614_p1822677418"></a>是</p> 204</td> 205<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p13221371412"><a name="zh-cn_topic_0000001163727614_p13221371412"></a><a name="zh-cn_topic_0000001163727614_p13221371412"></a>否</p> 206</td> 207<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p422127164110"><a name="zh-cn_topic_0000001163727614_p422127164110"></a><a name="zh-cn_topic_0000001163727614_p422127164110"></a>显示设备的屏幕密度，单位为像素。</p> 208</td> 209</tr> 210<tr id="zh-cn_topic_0000001163727614_row420113911425"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p220117954217"><a name="zh-cn_topic_0000001163727614_p220117954217"></a><a name="zh-cn_topic_0000001163727614_p220117954217"></a>scaledDensity</p> 211</td> 212<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p15201994420"><a name="zh-cn_topic_0000001163727614_p15201994420"></a><a name="zh-cn_topic_0000001163727614_p15201994420"></a>number</p> 213</td> 214<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p162025915423"><a name="zh-cn_topic_0000001163727614_p162025915423"></a><a name="zh-cn_topic_0000001163727614_p162025915423"></a>是</p> 215</td> 216<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p182027916423"><a name="zh-cn_topic_0000001163727614_p182027916423"></a><a name="zh-cn_topic_0000001163727614_p182027916423"></a>否</p> 217</td> 218<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p132021793429"><a name="zh-cn_topic_0000001163727614_p132021793429"></a><a name="zh-cn_topic_0000001163727614_p132021793429"></a>显示设备的显示字体的缩放因子。</p> 219</td> 220</tr> 221<tr id="zh-cn_topic_0000001163727614_row185973435316"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p1559710432310"><a name="zh-cn_topic_0000001163727614_p1559710432310"></a><a name="zh-cn_topic_0000001163727614_p1559710432310"></a>xDPI</p> 222</td> 223<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p16597144318312"><a name="zh-cn_topic_0000001163727614_p16597144318312"></a><a name="zh-cn_topic_0000001163727614_p16597144318312"></a>number</p> 224</td> 225<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p12597194313317"><a name="zh-cn_topic_0000001163727614_p12597194313317"></a><a name="zh-cn_topic_0000001163727614_p12597194313317"></a>是</p> 226</td> 227<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p1259710431236"><a name="zh-cn_topic_0000001163727614_p1259710431236"></a><a name="zh-cn_topic_0000001163727614_p1259710431236"></a>否</p> 228</td> 229<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p10597843034"><a name="zh-cn_topic_0000001163727614_p10597843034"></a><a name="zh-cn_topic_0000001163727614_p10597843034"></a>x方向中每英寸屏幕的确切物理像素值。</p> 230</td> 231</tr> 232<tr id="zh-cn_topic_0000001163727614_row138296171429"><td class="cellrowborder" valign="top" width="17.73%" headers="mcps1.1.6.1.1 "><p id="zh-cn_topic_0000001163727614_p183016179421"><a name="zh-cn_topic_0000001163727614_p183016179421"></a><a name="zh-cn_topic_0000001163727614_p183016179421"></a>yDPI</p> 233</td> 234<td class="cellrowborder" valign="top" width="24.6%" headers="mcps1.1.6.1.2 "><p id="zh-cn_topic_0000001163727614_p15830101715429"><a name="zh-cn_topic_0000001163727614_p15830101715429"></a><a name="zh-cn_topic_0000001163727614_p15830101715429"></a>number</p> 235</td> 236<td class="cellrowborder" valign="top" width="10.549999999999999%" headers="mcps1.1.6.1.3 "><p id="zh-cn_topic_0000001163727614_p198301917164219"><a name="zh-cn_topic_0000001163727614_p198301917164219"></a><a name="zh-cn_topic_0000001163727614_p198301917164219"></a>是</p> 237</td> 238<td class="cellrowborder" valign="top" width="9.34%" headers="mcps1.1.6.1.4 "><p id="zh-cn_topic_0000001163727614_p18301174421"><a name="zh-cn_topic_0000001163727614_p18301174421"></a><a name="zh-cn_topic_0000001163727614_p18301174421"></a>否</p> 239</td> 240<td class="cellrowborder" valign="top" width="37.78%" headers="mcps1.1.6.1.5 "><p id="zh-cn_topic_0000001163727614_p2083001718427"><a name="zh-cn_topic_0000001163727614_p2083001718427"></a><a name="zh-cn_topic_0000001163727614_p2083001718427"></a>y方向中每英寸屏幕的确切物理像素值。</p> 241</td> 242</tr> 243</tbody> 244</table> 245 246## display.getDefaultDisplay<a name="zh-cn_topic_0000001163727614_section39061940191"></a> 247 248getDefaultDisplay\(callback: AsyncCallback<Display\>\): void; 249 250获取当前默认的display对象。 251 252- 参数 253 254 <a name="zh-cn_topic_0000001163727614_table1889910298214"></a> 255 <table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row38991829162119"><th class="cellrowborder" valign="top" width="14.95%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001163727614_p17899192918217"><a name="zh-cn_topic_0000001163727614_p17899192918217"></a><a name="zh-cn_topic_0000001163727614_p17899192918217"></a>参数名</p> 256 </th> 257 <th class="cellrowborder" valign="top" width="41.839999999999996%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001163727614_p1389972922116"><a name="zh-cn_topic_0000001163727614_p1389972922116"></a><a name="zh-cn_topic_0000001163727614_p1389972922116"></a>类型</p> 258 </th> 259 <th class="cellrowborder" valign="top" width="7.829999999999999%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001163727614_p089952919215"><a name="zh-cn_topic_0000001163727614_p089952919215"></a><a name="zh-cn_topic_0000001163727614_p089952919215"></a>必填</p> 260 </th> 261 <th class="cellrowborder" valign="top" width="35.38%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001163727614_p178998291215"><a name="zh-cn_topic_0000001163727614_p178998291215"></a><a name="zh-cn_topic_0000001163727614_p178998291215"></a>说明</p> 262 </th> 263 </tr> 264 </thead> 265 <tbody><tr id="zh-cn_topic_0000001163727614_row18900102982117"><td class="cellrowborder" valign="top" width="14.95%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p1590019292215"><a name="zh-cn_topic_0000001163727614_p1590019292215"></a><a name="zh-cn_topic_0000001163727614_p1590019292215"></a>callback</p> 266 </td> 267 <td class="cellrowborder" valign="top" width="41.839999999999996%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p1290017293214"><a name="zh-cn_topic_0000001163727614_p1290017293214"></a><a name="zh-cn_topic_0000001163727614_p1290017293214"></a>AsyncCallback<<a href="#zh-cn_topic_0000001163727614_section12882825611">Display</a>></p> 268 </td> 269 <td class="cellrowborder" valign="top" width="7.829999999999999%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p990042932115"><a name="zh-cn_topic_0000001163727614_p990042932115"></a><a name="zh-cn_topic_0000001163727614_p990042932115"></a>是</p> 270 </td> 271 <td class="cellrowborder" valign="top" width="35.38%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p1790072917218"><a name="zh-cn_topic_0000001163727614_p1790072917218"></a><a name="zh-cn_topic_0000001163727614_p1790072917218"></a>回调返回显示设备的属性。</p> 272 </td> 273 </tr> 274 </tbody> 275 </table> 276 277- 示例 278 279 ``` 280 var displayClass = null; 281 display.getDefaultDisplay((err, data) => { 282 if (err) { 283 console.error('Failed to obtain the default display object. Code: ' + JSON.stringify(err)); 284 return; 285 } 286 console.info('Succeeded in obtaining the default display object. Data:' + JSON.stringify(data)); 287 displayClass = data; 288 }); 289 ``` 290 291 292## display.getAllDisplay<a name="zh-cn_topic_0000001163727614_section129251146697"></a> 293 294getAllDisplay\(callback: AsyncCallback<Array<Display\>\>\): void; 295 296获取当前所有的display对象。 297 298- 参数 299 300 <a name="zh-cn_topic_0000001163727614_table1098161318234"></a> 301 <table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row18981913132317"><th class="cellrowborder" valign="top" width="14.95%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001163727614_p898201322314"><a name="zh-cn_topic_0000001163727614_p898201322314"></a><a name="zh-cn_topic_0000001163727614_p898201322314"></a>参数名</p> 302 </th> 303 <th class="cellrowborder" valign="top" width="35.949999999999996%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001163727614_p8981013162319"><a name="zh-cn_topic_0000001163727614_p8981013162319"></a><a name="zh-cn_topic_0000001163727614_p8981013162319"></a>类型</p> 304 </th> 305 <th class="cellrowborder" valign="top" width="7.920000000000001%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001163727614_p298161362320"><a name="zh-cn_topic_0000001163727614_p298161362320"></a><a name="zh-cn_topic_0000001163727614_p298161362320"></a>必填</p> 306 </th> 307 <th class="cellrowborder" valign="top" width="41.18%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001163727614_p398101318235"><a name="zh-cn_topic_0000001163727614_p398101318235"></a><a name="zh-cn_topic_0000001163727614_p398101318235"></a>说明</p> 308 </th> 309 </tr> 310 </thead> 311 <tbody><tr id="zh-cn_topic_0000001163727614_row1798413152317"><td class="cellrowborder" valign="top" width="14.95%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p1798161319239"><a name="zh-cn_topic_0000001163727614_p1798161319239"></a><a name="zh-cn_topic_0000001163727614_p1798161319239"></a>callback</p> 312 </td> 313 <td class="cellrowborder" valign="top" width="35.949999999999996%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p7981213122317"><a name="zh-cn_topic_0000001163727614_p7981213122317"></a><a name="zh-cn_topic_0000001163727614_p7981213122317"></a>AsyncCallback<Array<<a href="#zh-cn_topic_0000001163727614_section12882825611">Display</a>>></p> 314 </td> 315 <td class="cellrowborder" valign="top" width="7.920000000000001%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p189861392314"><a name="zh-cn_topic_0000001163727614_p189861392314"></a><a name="zh-cn_topic_0000001163727614_p189861392314"></a>是</p> 316 </td> 317 <td class="cellrowborder" valign="top" width="41.18%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p29812131235"><a name="zh-cn_topic_0000001163727614_p29812131235"></a><a name="zh-cn_topic_0000001163727614_p29812131235"></a>回调返回多个显示设备的属性。</p> 318 </td> 319 </tr> 320 </tbody> 321 </table> 322 323- 示例 324 325 ``` 326 display.getAllDisplay((err, data) => { 327 if (err) { 328 console.error('Failed to obtain all the display objects. Code: ' + JSON.stringify(err)); 329 return; 330 } 331 console.info('Succeeded in obtaining all the display objects. Data: ' + JSON.stringify(data)) 332 }); 333 ``` 334 335 336## display.on\('add'|'remove'|'change'\)<a name="zh-cn_topic_0000001163727614_section5851341125"></a> 337 338on\(type: 'add'|'remove'|'change', callback: Callback<number\>\): void; 339 340开启监听。 341 342- 参数 343 344 <a name="zh-cn_topic_0000001163727614_table1185133418121"></a> 345 <table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row10857341125"><th class="cellrowborder" valign="top" width="12.97%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001163727614_p88503412128"><a name="zh-cn_topic_0000001163727614_p88503412128"></a><a name="zh-cn_topic_0000001163727614_p88503412128"></a>参数名</p> 346 </th> 347 <th class="cellrowborder" valign="top" width="31.130000000000003%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001163727614_p98513411125"><a name="zh-cn_topic_0000001163727614_p98513411125"></a><a name="zh-cn_topic_0000001163727614_p98513411125"></a>类型</p> 348 </th> 349 <th class="cellrowborder" valign="top" width="7.91%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001163727614_p585163481213"><a name="zh-cn_topic_0000001163727614_p585163481213"></a><a name="zh-cn_topic_0000001163727614_p585163481213"></a>必填</p> 350 </th> 351 <th class="cellrowborder" valign="top" width="47.99%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001163727614_p086183411124"><a name="zh-cn_topic_0000001163727614_p086183411124"></a><a name="zh-cn_topic_0000001163727614_p086183411124"></a>说明</p> 352 </th> 353 </tr> 354 </thead> 355 <tbody><tr id="zh-cn_topic_0000001163727614_row286153419127"><td class="cellrowborder" valign="top" width="12.97%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p108693415126"><a name="zh-cn_topic_0000001163727614_p108693415126"></a><a name="zh-cn_topic_0000001163727614_p108693415126"></a>type</p> 356 </td> 357 <td class="cellrowborder" valign="top" width="31.130000000000003%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p18867344125"><a name="zh-cn_topic_0000001163727614_p18867344125"></a><a name="zh-cn_topic_0000001163727614_p18867344125"></a>string</p> 358 </td> 359 <td class="cellrowborder" valign="top" width="7.91%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p7863341127"><a name="zh-cn_topic_0000001163727614_p7863341127"></a><a name="zh-cn_topic_0000001163727614_p7863341127"></a>是</p> 360 </td> 361 <td class="cellrowborder" valign="top" width="47.99%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p12576162873620"><a name="zh-cn_topic_0000001163727614_p12576162873620"></a><a name="zh-cn_topic_0000001163727614_p12576162873620"></a>设置监听类型。</p> 362 <a name="zh-cn_topic_0000001163727614_ul5610203018367"></a><a name="zh-cn_topic_0000001163727614_ul5610203018367"></a><ul id="zh-cn_topic_0000001163727614_ul5610203018367"><li>type为"add"，表示监听增加显示设备。</li><li>type为"remove"，表示监听移除显示设备。</li><li>type为"change"，表示监听改变显示设备。</li></ul> 363 </td> 364 </tr> 365 <tr id="zh-cn_topic_0000001163727614_row926414772311"><td class="cellrowborder" valign="top" width="12.97%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p8654354112313"><a name="zh-cn_topic_0000001163727614_p8654354112313"></a><a name="zh-cn_topic_0000001163727614_p8654354112313"></a>callback</p> 366 </td> 367 <td class="cellrowborder" valign="top" width="31.130000000000003%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p2654854112310"><a name="zh-cn_topic_0000001163727614_p2654854112310"></a><a name="zh-cn_topic_0000001163727614_p2654854112310"></a>Callback<number></p> 368 </td> 369 <td class="cellrowborder" valign="top" width="7.91%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p15654185417236"><a name="zh-cn_topic_0000001163727614_p15654185417236"></a><a name="zh-cn_topic_0000001163727614_p15654185417236"></a>是</p> 370 </td> 371 <td class="cellrowborder" valign="top" width="47.99%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p965485411233"><a name="zh-cn_topic_0000001163727614_p965485411233"></a><a name="zh-cn_topic_0000001163727614_p965485411233"></a>回调返回监听到的显示设备的id。</p> 372 </td> 373 </tr> 374 </tbody> 375 </table> 376 377- 示例 378 379 ``` 380 var type = "add"; 381 var callback = (data) => { 382 console.info('Listening enabled. Data: ' + JSON.stringify(data)) 383 } 384 display.on(type, callback); 385 ``` 386 387 388## display.off\('add'|'remove'|'change'\)<a name="zh-cn_topic_0000001163727614_section13178205443512"></a> 389 390off\(type: 'add'|'remove'|'change', callback?: Callback<number\>\): void; 391 392关闭监听。 393 394- 参数 395 396 <a name="zh-cn_topic_0000001163727614_table1717865483515"></a> 397 <table><thead align="left"><tr id="zh-cn_topic_0000001163727614_row91789548359"><th class="cellrowborder" valign="top" width="12.479999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001163727614_p19178185413352"><a name="zh-cn_topic_0000001163727614_p19178185413352"></a><a name="zh-cn_topic_0000001163727614_p19178185413352"></a>参数名</p> 398 </th> 399 <th class="cellrowborder" valign="top" width="26.32%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001163727614_p41780541354"><a name="zh-cn_topic_0000001163727614_p41780541354"></a><a name="zh-cn_topic_0000001163727614_p41780541354"></a>类型</p> 400 </th> 401 <th class="cellrowborder" valign="top" width="9.3%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001163727614_p917895443512"><a name="zh-cn_topic_0000001163727614_p917895443512"></a><a name="zh-cn_topic_0000001163727614_p917895443512"></a>必填</p> 402 </th> 403 <th class="cellrowborder" valign="top" width="51.9%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001163727614_p17178205410352"><a name="zh-cn_topic_0000001163727614_p17178205410352"></a><a name="zh-cn_topic_0000001163727614_p17178205410352"></a>说明</p> 404 </th> 405 </tr> 406 </thead> 407 <tbody><tr id="zh-cn_topic_0000001163727614_row151787544353"><td class="cellrowborder" valign="top" width="12.479999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p1217819543355"><a name="zh-cn_topic_0000001163727614_p1217819543355"></a><a name="zh-cn_topic_0000001163727614_p1217819543355"></a>type</p> 408 </td> 409 <td class="cellrowborder" valign="top" width="26.32%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p417915453516"><a name="zh-cn_topic_0000001163727614_p417915453516"></a><a name="zh-cn_topic_0000001163727614_p417915453516"></a>string</p> 410 </td> 411 <td class="cellrowborder" valign="top" width="9.3%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p81791954203516"><a name="zh-cn_topic_0000001163727614_p81791954203516"></a><a name="zh-cn_topic_0000001163727614_p81791954203516"></a>是</p> 412 </td> 413 <td class="cellrowborder" valign="top" width="51.9%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p11366379368"><a name="zh-cn_topic_0000001163727614_p11366379368"></a><a name="zh-cn_topic_0000001163727614_p11366379368"></a>设置监听类型。</p> 414 <a name="zh-cn_topic_0000001163727614_ul20308203893611"></a><a name="zh-cn_topic_0000001163727614_ul20308203893611"></a><ul id="zh-cn_topic_0000001163727614_ul20308203893611"><li>type为"add"，表示监听增加显示设备。</li><li>type为"remove"，表示监听移除显示设备。</li><li>type为"change"，表示监听改变显示设备。</li></ul> 415 </td> 416 </tr> 417 <tr id="zh-cn_topic_0000001163727614_row152711425132514"><td class="cellrowborder" valign="top" width="12.479999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001163727614_p0986172612510"><a name="zh-cn_topic_0000001163727614_p0986172612510"></a><a name="zh-cn_topic_0000001163727614_p0986172612510"></a>callback</p> 418 </td> 419 <td class="cellrowborder" valign="top" width="26.32%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001163727614_p9987102617255"><a name="zh-cn_topic_0000001163727614_p9987102617255"></a><a name="zh-cn_topic_0000001163727614_p9987102617255"></a>Callback<number></p> 420 </td> 421 <td class="cellrowborder" valign="top" width="9.3%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001163727614_p1798742617259"><a name="zh-cn_topic_0000001163727614_p1798742617259"></a><a name="zh-cn_topic_0000001163727614_p1798742617259"></a>否</p> 422 </td> 423 <td class="cellrowborder" valign="top" width="51.9%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001163727614_p1698722611251"><a name="zh-cn_topic_0000001163727614_p1698722611251"></a><a name="zh-cn_topic_0000001163727614_p1698722611251"></a>回调返回监听到的显示设备的id。</p> 424 </td> 425 </tr> 426 </tbody> 427 </table> 428 429- 示例 430 431 ``` 432 var type = "remove"; 433 display.off(type); 434 ``` 435 436 437
