1 /* 2 * Copyright (C) 2007 Google Inc. 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.internal.app; 18 19 import android.app.AlertDialog; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.DialogInterface; 23 import android.content.Intent; 24 import android.content.IntentFilter; 25 import android.os.Bundle; 26 import android.os.Handler; 27 import android.os.IMountService; 28 import android.os.Message; 29 import android.os.RemoteException; 30 import android.os.ServiceManager; 31 import android.widget.Toast; 32 33 /** 34 * This activity is shown to the user for him/her to enable USB mass storage 35 * on-demand (that is, when the USB cable is connected). It uses the alert 36 * dialog style. It will be launched from a notification. 37 */ 38 public class UsbStorageActivity extends AlertActivity implements DialogInterface.OnClickListener { 39 40 private static final int POSITIVE_BUTTON = AlertDialog.BUTTON1; 41 42 /** Used to detect when the USB cable is unplugged, so we can call finish() */ 43 private BroadcastReceiver mBatteryReceiver = new BroadcastReceiver() { 44 @Override 45 public void onReceive(Context context, Intent intent) { 46 if (intent.getAction() == Intent.ACTION_BATTERY_CHANGED) { 47 handleBatteryChanged(intent); 48 } 49 } 50 }; 51 52 @Override onCreate(Bundle savedInstanceState)53 protected void onCreate(Bundle savedInstanceState) { 54 super.onCreate(savedInstanceState); 55 56 // Set up the "dialog" 57 final AlertController.AlertParams p = mAlertParams; 58 p.mIconId = com.android.internal.R.drawable.ic_dialog_usb; 59 p.mTitle = getString(com.android.internal.R.string.usb_storage_title); 60 p.mMessage = getString(com.android.internal.R.string.usb_storage_message); 61 p.mPositiveButtonText = getString(com.android.internal.R.string.usb_storage_button_mount); 62 p.mPositiveButtonListener = this; 63 p.mNegativeButtonText = getString(com.android.internal.R.string.usb_storage_button_unmount); 64 p.mNegativeButtonListener = this; 65 setupAlert(); 66 } 67 68 @Override onResume()69 protected void onResume() { 70 super.onResume(); 71 72 registerReceiver(mBatteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); 73 } 74 75 @Override onPause()76 protected void onPause() { 77 super.onPause(); 78 79 unregisterReceiver(mBatteryReceiver); 80 } 81 82 /** 83 * {@inheritDoc} 84 */ onClick(DialogInterface dialog, int which)85 public void onClick(DialogInterface dialog, int which) { 86 87 if (which == POSITIVE_BUTTON) { 88 mountAsUsbStorage(); 89 } 90 91 // No matter what, finish the activity 92 finish(); 93 } 94 mountAsUsbStorage()95 private void mountAsUsbStorage() { 96 IMountService mountService = IMountService.Stub.asInterface(ServiceManager 97 .getService("mount")); 98 if (mountService == null) { 99 showSharingError(); 100 return; 101 } 102 103 try { 104 mountService.setMassStorageEnabled(true); 105 } catch (RemoteException e) { 106 showSharingError(); 107 return; 108 } 109 } 110 handleBatteryChanged(Intent intent)111 private void handleBatteryChanged(Intent intent) { 112 int pluggedType = intent.getIntExtra("plugged", 0); 113 if (pluggedType == 0) { 114 // It was disconnected from the plug, so finish 115 finish(); 116 } 117 } 118 showSharingError()119 private void showSharingError() { 120 Toast.makeText(this, com.android.internal.R.string.usb_storage_error_message, 121 Toast.LENGTH_LONG).show(); 122 } 123 124 } 125