1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.deviceinfo; 18 19 import android.app.AlertDialog; 20 import android.app.Dialog; 21 import android.content.BroadcastReceiver; 22 import android.content.ContentQueryMap; 23 import android.content.ContentResolver; 24 import android.content.Context; 25 import android.content.Intent; 26 import android.content.IntentFilter; 27 import android.hardware.usb.UsbManager; 28 import android.os.Bundle; 29 import android.preference.CheckBoxPreference; 30 import android.preference.Preference; 31 import android.preference.PreferenceScreen; 32 import android.provider.Settings; 33 import android.util.Log; 34 35 import com.android.settings.R; 36 import com.android.settings.SettingsPreferenceFragment; 37 import com.android.settings.Utils; 38 39 /** 40 * USB storage settings. 41 */ 42 public class UsbSettings extends SettingsPreferenceFragment { 43 44 private static final String TAG = "UsbSettings"; 45 46 private static final String KEY_MTP = "usb_mtp"; 47 private static final String KEY_PTP = "usb_ptp"; 48 49 private UsbManager mUsbManager; 50 private CheckBoxPreference mMtp; 51 private CheckBoxPreference mPtp; 52 53 private final BroadcastReceiver mStateReceiver = new BroadcastReceiver() { 54 public void onReceive(Context content, Intent intent) { 55 updateToggles(mUsbManager.getDefaultFunction()); 56 } 57 }; 58 createPreferenceHierarchy()59 private PreferenceScreen createPreferenceHierarchy() { 60 PreferenceScreen root = getPreferenceScreen(); 61 if (root != null) { 62 root.removeAll(); 63 } 64 addPreferencesFromResource(R.xml.usb_settings); 65 root = getPreferenceScreen(); 66 67 mMtp = (CheckBoxPreference)root.findPreference(KEY_MTP); 68 mPtp = (CheckBoxPreference)root.findPreference(KEY_PTP); 69 70 return root; 71 } 72 73 @Override onCreate(Bundle icicle)74 public void onCreate(Bundle icicle) { 75 super.onCreate(icicle); 76 mUsbManager = (UsbManager)getSystemService(Context.USB_SERVICE); 77 } 78 79 @Override onPause()80 public void onPause() { 81 super.onPause(); 82 getActivity().unregisterReceiver(mStateReceiver); 83 } 84 85 @Override onResume()86 public void onResume() { 87 super.onResume(); 88 89 // Make sure we reload the preference hierarchy since some of these settings 90 // depend on others... 91 createPreferenceHierarchy(); 92 93 // ACTION_USB_STATE is sticky so this will call updateToggles 94 getActivity().registerReceiver(mStateReceiver, 95 new IntentFilter(UsbManager.ACTION_USB_STATE)); 96 } 97 updateToggles(String function)98 private void updateToggles(String function) { 99 if (UsbManager.USB_FUNCTION_MTP.equals(function)) { 100 mMtp.setChecked(true); 101 mPtp.setChecked(false); 102 } else if (UsbManager.USB_FUNCTION_PTP.equals(function)) { 103 mMtp.setChecked(false); 104 mPtp.setChecked(true); 105 } else { 106 mMtp.setChecked(false); 107 mPtp.setChecked(false); 108 } 109 } 110 111 @Override onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)112 public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { 113 114 // Don't allow any changes to take effect as the USB host will be disconnected, killing 115 // the monkeys 116 if (Utils.isMonkeyRunning()) { 117 return true; 118 } 119 // temporary hack - using check boxes as radio buttons 120 // don't allow unchecking them 121 if (preference instanceof CheckBoxPreference) { 122 CheckBoxPreference checkBox = (CheckBoxPreference)preference; 123 if (!checkBox.isChecked()) { 124 checkBox.setChecked(true); 125 return true; 126 } 127 } 128 if (preference == mMtp) { 129 mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_MTP, true); 130 updateToggles(UsbManager.USB_FUNCTION_MTP); 131 } else if (preference == mPtp) { 132 mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_PTP, true); 133 updateToggles(UsbManager.USB_FUNCTION_PTP); 134 } 135 return true; 136 } 137 } 138