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 disable USB mass storage. 35 * It uses the alert dialog style. It will be launched from a notification. 36 */ 37 public class UsbStorageStopActivity extends AlertActivity implements DialogInterface.OnClickListener { 38 39 private static final int POSITIVE_BUTTON = AlertDialog.BUTTON1; 40 41 /** Used to detect when the USB cable is unplugged, so we can call finish() */ 42 private BroadcastReceiver mBatteryReceiver = new BroadcastReceiver() { 43 @Override 44 public void onReceive(Context context, Intent intent) { 45 if (intent.getAction() == Intent.ACTION_BATTERY_CHANGED) { 46 handleBatteryChanged(intent); 47 } 48 } 49 }; 50 51 @Override onCreate(Bundle savedInstanceState)52 protected void onCreate(Bundle savedInstanceState) { 53 super.onCreate(savedInstanceState); 54 55 // Set up the "dialog" 56 final AlertController.AlertParams p = mAlertParams; 57 p.mIconId = com.android.internal.R.drawable.ic_dialog_alert; 58 p.mTitle = getString(com.android.internal.R.string.usb_storage_stop_title); 59 p.mMessage = getString(com.android.internal.R.string.usb_storage_stop_message); 60 p.mPositiveButtonText = getString(com.android.internal.R.string.usb_storage_stop_button_mount); 61 p.mPositiveButtonListener = this; 62 p.mNegativeButtonText = getString(com.android.internal.R.string.usb_storage_stop_button_unmount); 63 p.mNegativeButtonListener = this; 64 setupAlert(); 65 } 66 67 @Override onResume()68 protected void onResume() { 69 super.onResume(); 70 71 registerReceiver(mBatteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); 72 } 73 74 @Override onPause()75 protected void onPause() { 76 super.onPause(); 77 78 unregisterReceiver(mBatteryReceiver); 79 } 80 81 /** 82 * {@inheritDoc} 83 */ onClick(DialogInterface dialog, int which)84 public void onClick(DialogInterface dialog, int which) { 85 86 if (which == POSITIVE_BUTTON) { 87 stopUsbStorage(); 88 } 89 90 // No matter what, finish the activity 91 finish(); 92 } 93 stopUsbStorage()94 private void stopUsbStorage() { 95 IMountService mountService = IMountService.Stub.asInterface(ServiceManager 96 .getService("mount")); 97 if (mountService == null) { 98 showStoppingError(); 99 return; 100 } 101 102 try { 103 mountService.setMassStorageEnabled(false); 104 } catch (RemoteException e) { 105 showStoppingError(); 106 return; 107 } 108 } 109 handleBatteryChanged(Intent intent)110 private void handleBatteryChanged(Intent intent) { 111 int pluggedType = intent.getIntExtra("plugged", 0); 112 if (pluggedType == 0) { 113 // It was disconnected from the plug, so finish 114 finish(); 115 } 116 } 117 showStoppingError()118 private void showStoppingError() { 119 Toast.makeText(this, com.android.internal.R.string.usb_storage_stop_error_message, 120 Toast.LENGTH_LONG).show(); 121 } 122 123 } 124