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      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.systemui.usb;
     18 
     19 import android.app.AlertDialog;
     20 import android.app.PendingIntent;
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.Intent;
     24 import android.content.pm.ApplicationInfo;
     25 import android.content.pm.PackageManager;
     26 import android.hardware.usb.IUsbManager;
     27 import android.hardware.usb.UsbAccessory;
     28 import android.hardware.usb.UsbDevice;
     29 import android.hardware.usb.UsbManager;
     30 import android.os.Bundle;
     31 import android.os.IBinder;
     32 import android.os.RemoteException;
     33 import android.os.ServiceManager;
     34 import android.os.UserHandle;
     35 import android.util.Log;
     36 import android.view.LayoutInflater;
     37 import android.view.View;
     38 import android.widget.CheckBox;
     39 import android.widget.CompoundButton;
     40 import android.widget.TextView;
     41 
     42 import com.android.internal.app.AlertActivity;
     43 import com.android.internal.app.AlertController;
     44 import com.android.systemui.R;
     45 
     46 public class UsbPermissionActivity extends AlertActivity
     47         implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
     48 
     49     private static final String TAG = "UsbPermissionActivity";
     50 
     51     private CheckBox mAlwaysUse;
     52     private TextView mClearDefaultHint;
     53     private UsbDevice mDevice;
     54     private UsbAccessory mAccessory;
     55     private PendingIntent mPendingIntent;
     56     private String mPackageName;
     57     private int mUid;
     58     private boolean mPermissionGranted;
     59     private UsbDisconnectedReceiver mDisconnectedReceiver;
     60 
     61     @Override
     62     public void onCreate(Bundle icicle) {
     63         super.onCreate(icicle);
     64 
     65        Intent intent = getIntent();
     66         mDevice = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
     67         mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
     68         mPendingIntent = (PendingIntent)intent.getParcelableExtra(Intent.EXTRA_INTENT);
     69         mUid = intent.getIntExtra(Intent.EXTRA_UID, -1);
     70         mPackageName = intent.getStringExtra("package");
     71 
     72         PackageManager packageManager = getPackageManager();
     73         ApplicationInfo aInfo;
     74         try {
     75             aInfo = packageManager.getApplicationInfo(mPackageName, 0);
     76         } catch (PackageManager.NameNotFoundException e) {
     77             Log.e(TAG, "unable to look up package name", e);
     78             finish();
     79             return;
     80         }
     81         String appName = aInfo.loadLabel(packageManager).toString();
     82 
     83         final AlertController.AlertParams ap = mAlertParams;
     84         ap.mIcon = aInfo.loadIcon(packageManager);
     85         ap.mTitle = appName;
     86         if (mDevice == null) {
     87             ap.mMessage = getString(R.string.usb_accessory_permission_prompt, appName);
     88             mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
     89         } else {
     90             ap.mMessage = getString(R.string.usb_device_permission_prompt, appName);
     91             mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mDevice);
     92         }
     93         ap.mPositiveButtonText = getString(android.R.string.ok);
     94         ap.mNegativeButtonText = getString(android.R.string.cancel);
     95         ap.mPositiveButtonListener = this;
     96         ap.mNegativeButtonListener = this;
     97 
     98         // add "always use" checkbox
     99         LayoutInflater inflater = (LayoutInflater)getSystemService(
    100                 Context.LAYOUT_INFLATER_SERVICE);
    101         ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
    102         mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
    103         if (mDevice == null) {
    104             mAlwaysUse.setText(R.string.always_use_accessory);
    105         } else {
    106             mAlwaysUse.setText(R.string.always_use_device);
    107         }
    108         mAlwaysUse.setOnCheckedChangeListener(this);
    109         mClearDefaultHint = (TextView)ap.mView.findViewById(
    110                                                     com.android.internal.R.id.clearDefaultHint);
    111         mClearDefaultHint.setVisibility(View.GONE);
    112 
    113         setupAlert();
    114 
    115     }
    116 
    117     @Override
    118     public void onDestroy() {
    119         IBinder b = ServiceManager.getService(USB_SERVICE);
    120         IUsbManager service = IUsbManager.Stub.asInterface(b);
    121 
    122         // send response via pending intent
    123         Intent intent = new Intent();
    124         try {
    125             if (mDevice != null) {
    126                 intent.putExtra(UsbManager.EXTRA_DEVICE, mDevice);
    127                 if (mPermissionGranted) {
    128                     service.grantDevicePermission(mDevice, mUid);
    129                     if (mAlwaysUse.isChecked()) {
    130                         final int userId = UserHandle.getUserId(mUid);
    131                         service.setDevicePackage(mDevice, mPackageName, userId);
    132                     }
    133                 }
    134             }
    135             if (mAccessory != null) {
    136                 intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
    137                 if (mPermissionGranted) {
    138                     service.grantAccessoryPermission(mAccessory, mUid);
    139                     if (mAlwaysUse.isChecked()) {
    140                         final int userId = UserHandle.getUserId(mUid);
    141                         service.setAccessoryPackage(mAccessory, mPackageName, userId);
    142                     }
    143                 }
    144             }
    145             intent.putExtra(UsbManager.EXTRA_PERMISSION_GRANTED, mPermissionGranted);
    146             mPendingIntent.send(this, 0, intent);
    147         } catch (PendingIntent.CanceledException e) {
    148             Log.w(TAG, "PendingIntent was cancelled");
    149         } catch (RemoteException e) {
    150             Log.e(TAG, "IUsbService connection failed", e);
    151         }
    152 
    153         if (mDisconnectedReceiver != null) {
    154             unregisterReceiver(mDisconnectedReceiver);
    155         }
    156         super.onDestroy();
    157     }
    158 
    159     public void onClick(DialogInterface dialog, int which) {
    160         if (which == AlertDialog.BUTTON_POSITIVE) {
    161             mPermissionGranted = true;
    162         }
    163         finish();
    164     }
    165 
    166     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    167         if (mClearDefaultHint == null) return;
    168 
    169         if(isChecked) {
    170             mClearDefaultHint.setVisibility(View.VISIBLE);
    171         } else {
    172             mClearDefaultHint.setVisibility(View.GONE);
    173         }
    174     }
    175 }
    176