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/*
* 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}, Live 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();
}
}
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