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      1 /*
      2  * Copyright (C) 2017 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.development;
     18 
     19 import static com.android.settings.development.DevelopmentOptionsActivityRequestCodes
     20         .REQUEST_CODE_DEBUG_APP;
     21 
     22 import android.app.Activity;
     23 import android.app.ActivityManager;
     24 import android.app.IActivityManager;
     25 import android.content.Context;
     26 import android.content.Intent;
     27 import android.os.RemoteException;
     28 import android.provider.Settings;
     29 import android.support.annotation.VisibleForTesting;
     30 import android.support.v14.preference.SwitchPreference;
     31 import android.support.v7.preference.Preference;
     32 import android.text.TextUtils;
     33 
     34 import com.android.settings.core.PreferenceControllerMixin;
     35 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
     36 
     37 public class WaitForDebuggerPreferenceController extends DeveloperOptionsPreferenceController
     38         implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin,
     39         OnActivityResultListener {
     40 
     41     private static final String WAIT_FOR_DEBUGGER_KEY = "wait_for_debugger";
     42 
     43     @VisibleForTesting
     44     static final int SETTING_VALUE_ON = 1;
     45     @VisibleForTesting
     46     static final int SETTING_VALUE_OFF = 0;
     47 
     48     public WaitForDebuggerPreferenceController(Context context) {
     49         super(context);
     50     }
     51 
     52     @Override
     53     public String getPreferenceKey() {
     54         return WAIT_FOR_DEBUGGER_KEY;
     55     }
     56 
     57     @Override
     58     public boolean onPreferenceChange(Preference preference, Object newValue) {
     59         final boolean debuggerEnabled = (Boolean) newValue;
     60         final String debugApp = Settings.Global.getString(
     61                 mContext.getContentResolver(), Settings.Global.DEBUG_APP);
     62         writeDebuggerAppOptions(debugApp, debuggerEnabled, true /* persistent */);
     63         return true;
     64     }
     65 
     66     @Override
     67     public void updateState(Preference preference) {
     68         updateState(mPreference, Settings.Global.getString(
     69             mContext.getContentResolver(), Settings.Global.DEBUG_APP));
     70     }
     71 
     72     @Override
     73     public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
     74         if (requestCode != REQUEST_CODE_DEBUG_APP || resultCode != Activity.RESULT_OK) {
     75             return false;
     76         }
     77         updateState(mPreference, data.getAction());
     78         return true;
     79     }
     80 
     81     private void updateState(Preference preference, String debugApp) {
     82         final SwitchPreference switchPreference = (SwitchPreference) preference;
     83         final boolean debuggerEnabled = Settings.Global.getInt(mContext.getContentResolver(),
     84             Settings.Global.WAIT_FOR_DEBUGGER, SETTING_VALUE_OFF) != SETTING_VALUE_OFF;
     85         writeDebuggerAppOptions(debugApp, debuggerEnabled, true /* persistent */);
     86         switchPreference.setChecked(debuggerEnabled);
     87         switchPreference.setEnabled(!TextUtils.isEmpty(debugApp));
     88     }
     89 
     90     @Override
     91     protected void onDeveloperOptionsSwitchDisabled() {
     92         super.onDeveloperOptionsSwitchDisabled();
     93         writeDebuggerAppOptions(null /* package name */,
     94                 false /* waitForDebugger */, false /* persistent */);
     95         ((SwitchPreference) mPreference).setChecked(false);
     96     }
     97 
     98     @VisibleForTesting
     99     IActivityManager getActivityManagerService() {
    100         return ActivityManager.getService();
    101     }
    102 
    103     private void writeDebuggerAppOptions(String packageName, boolean waitForDebugger,
    104             boolean persistent) {
    105         try {
    106             getActivityManagerService().setDebugApp(packageName, waitForDebugger, persistent);
    107         } catch (RemoteException ex) {
    108             /* intentional no-op */
    109         }
    110     }
    111 }
    112