Example of various Intent flags to modify the activity stack
package com.example.android.apis.app;
import com.example.android.apis.R;
import android.app.Activity;
import android.app.PendingIntent;
import android.app.PendingIntent.CanceledException;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
/**
* Example of various Intent flags to modify the activity stack.
*/
public class IntentActivityFlags extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intent_activity_flags);
// Watch for button clicks.
Button button = (Button)findViewById(R.id.flag_activity_clear_task);
button.setOnClickListener(mFlagActivityClearTaskListener);
button = (Button)findViewById(R.id.flag_activity_clear_task_pi);
button.setOnClickListener(mFlagActivityClearTaskPIListener);
}
/**
* This creates an array of Intent objects representing the back stack
* for a user going into the Views/Lists API demos.
*/
private Intent[] buildIntentsToViewsLists() {
// We are going to rebuild our task with a new back stack. This will
// be done by launching an array of Intents, representing the new
// back stack to be created, with the first entry holding the root
// and requesting to reset the back stack.
Intent[] intents = new Intent[3];
// First: root activity of ApiDemos.
// This is a convenient way to make the proper Intent to launch and
// reset an application's task.
intents[0] = Intent.makeRestartActivityTask(new ComponentName(this,
com.example.android.apis.ApiDemos.class));
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setClass(IntentActivityFlags.this, com.example.android.apis.ApiDemos.class);
intent.putExtra("com.example.android.apis.Path", "Views");
intents[1] = intent;
intent = new Intent(Intent.ACTION_MAIN);
intent.setClass(IntentActivityFlags.this, com.example.android.apis.ApiDemos.class);
intent.putExtra("com.example.android.apis.Path", "Views/Lists");
intents[2] = intent;
return intents;
}
private OnClickListener mFlagActivityClearTaskListener = new OnClickListener() {
public void onClick(View v) {
startActivities(buildIntentsToViewsLists());
}
};
private OnClickListener mFlagActivityClearTaskPIListener = new OnClickListener() {
public void onClick(View v) {
Context context = IntentActivityFlags.this;
PendingIntent pi = PendingIntent.getActivities(context, 0,
buildIntentsToViewsLists(), PendingIntent.FLAG_UPDATE_CURRENT);
try {
pi.send();
} catch (CanceledException e) {
Log.w("IntentActivityFlags", "Failed sending PendingIntent", e);
}
}
};
}
/*
* Copyright (C) 2007 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.example.android.apis;
import android.app.ListActivity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ApiDemos extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String path = intent.getStringExtra("com.example.android.apis.Path");
if (path == null) {
path = "";
}
setListAdapter(new SimpleAdapter(this, getData(path),
android.R.layout.simple_list_item_1, new String[] { "title" },
new int[] { android.R.id.text1 }));
getListView().setTextFilterEnabled(true);
}
protected List