| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.tv; |
| |
| import android.app.Activity; |
| import android.content.ActivityNotFoundException; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.Bundle; |
| import android.util.Log; |
| |
| /** |
| * An activity to launch a new activity. |
| * |
| * <p>In the case when {@link MainActivity} starts a new activity using {@link |
| * Activity#startActivity} or {@link Activity#startActivityForResult}, TV app is terminated if the |
| * new activity crashes. That's because the {@link android.app.ActivityManager} terminates the |
| * activity which is just below the crashed activity in the activity stack. To avoid this, we need |
| * to locate an additional activity between these activities in the activity stack. |
| */ |
| public class LauncherActivity extends Activity { |
| private static final String TAG = "LauncherActivity"; |
| |
| public static final String ERROR_MESSAGE = "com.android.tv.LauncherActivity.ErrorMessage"; |
| |
| private static final int REQUEST_CODE_DEFAULT = 0; |
| private static final int REQUEST_START_ACTIVITY = 100; |
| |
| private static final String EXTRA_INTENT = "com.android.tv.LauncherActivity.INTENT"; |
| private static final String EXTRA_REQUEST_RESULT = |
| "com.android.tv.LauncherActivity.REQUEST_RESULT"; |
| |
| /** Starts an activity by calling {@link Activity#startActivity}. */ |
| public static void startActivitySafe(Activity baseActivity, Intent intentToLaunch) { |
| // To avoid the app termination when the new activity crashes, LauncherActivity should be |
| // started by calling startActivityForResult(). |
| baseActivity.startActivityForResult( |
| createIntent(baseActivity, intentToLaunch, false), REQUEST_CODE_DEFAULT); |
| } |
| |
| private static Intent createIntent( |
| Context context, Intent intentToLaunch, boolean requestResult) { |
| Intent intent = new Intent(context, LauncherActivity.class); |
| intent.putExtra(EXTRA_INTENT, intentToLaunch); |
| if (requestResult) { |
| intent.putExtra(EXTRA_REQUEST_RESULT, true); |
| } |
| return intent; |
| } |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| // We should launch the new activity in onCreate rather than in onStart. |
| // That's because it is not guaranteed that onStart is called only once. |
| Intent intent = getIntent().getParcelableExtra(EXTRA_INTENT); |
| boolean requestResult = getIntent().getBooleanExtra(EXTRA_REQUEST_RESULT, false); |
| try { |
| if (requestResult) { |
| startActivityForResult(intent, REQUEST_START_ACTIVITY); |
| } else { |
| startActivity(intent); |
| setResult(Activity.RESULT_OK); |
| finish(); |
| } |
| } catch (ActivityNotFoundException e) { |
| Log.w(TAG, "Activity not found for " + intent); |
| intent.putExtra(ERROR_MESSAGE, getResources().getString(R.string.msg_missing_app)); |
| setResult(Activity.RESULT_CANCELED, intent); |
| finish(); |
| } |
| } |
| |
| @Override |
| public void onActivityResult(int requestCode, int resultCode, Intent data) { |
| setResult(resultCode, data); |
| finish(); |
| } |
| } |