1 package com.example.android.apis.app; 2 3 import com.example.android.apis.R; 4 5 import android.app.Activity; 6 import android.app.PendingIntent; 7 import android.app.PendingIntent.CanceledException; 8 import android.content.ComponentName; 9 import android.content.Context; 10 import android.content.Intent; 11 import android.os.Bundle; 12 import android.util.Log; 13 import android.view.View; 14 import android.view.View.OnClickListener; 15 import android.widget.Button; 16 17 /** 18 * Example of various Intent flags to modify the activity stack. 19 */ 20 public class IntentActivityFlags extends Activity { 21 @Override 22 protected void onCreate(Bundle savedInstanceState) { 23 super.onCreate(savedInstanceState); 24 25 setContentView(R.layout.intent_activity_flags); 26 27 // Watch for button clicks. 28 Button button = (Button)findViewById(R.id.flag_activity_clear_task); 29 button.setOnClickListener(mFlagActivityClearTaskListener); 30 button = (Button)findViewById(R.id.flag_activity_clear_task_pi); 31 button.setOnClickListener(mFlagActivityClearTaskPIListener); 32 } 33 34 /** 35 * This creates an array of Intent objects representing the back stack 36 * for a user going into the Views/Lists API demos. 37 */ 38 //BEGIN_INCLUDE(intent_array) 39 private Intent[] buildIntentsToViewsLists() { 40 // We are going to rebuild our task with a new back stack. This will 41 // be done by launching an array of Intents, representing the new 42 // back stack to be created, with the first entry holding the root 43 // and requesting to reset the back stack. 44 Intent[] intents = new Intent[3]; 45 46 // First: root activity of ApiDemos. 47 // This is a convenient way to make the proper Intent to launch and 48 // reset an application's task. 49 intents[0] = Intent.makeRestartActivityTask(new ComponentName(this, 50 com.example.android.apis.ApiDemos.class)); 51 52 Intent intent = new Intent(Intent.ACTION_MAIN); 53 intent.setClass(IntentActivityFlags.this, com.example.android.apis.ApiDemos.class); 54 intent.putExtra("com.example.android.apis.Path", "Views"); 55 intents[1] = intent; 56 57 intent = new Intent(Intent.ACTION_MAIN); 58 intent.setClass(IntentActivityFlags.this, com.example.android.apis.ApiDemos.class); 59 intent.putExtra("com.example.android.apis.Path", "Views/Lists"); 60 61 intents[2] = intent; 62 return intents; 63 } 64 //END_INCLUDE(intent_array) 65 66 private OnClickListener mFlagActivityClearTaskListener = new OnClickListener() { 67 public void onClick(View v) { 68 startActivities(buildIntentsToViewsLists()); 69 } 70 }; 71 72 private OnClickListener mFlagActivityClearTaskPIListener = new OnClickListener() { 73 public void onClick(View v) { 74 Context context = IntentActivityFlags.this; 75 //BEGIN_INCLUDE(pending_intent) 76 PendingIntent pi = PendingIntent.getActivities(context, 0, 77 buildIntentsToViewsLists(), PendingIntent.FLAG_UPDATE_CURRENT); 78 //END_INCLUDE(pending_intent) 79 try { 80 pi.send(); 81 } catch (CanceledException e) { 82 Log.w("IntentActivityFlags", "Failed sending PendingIntent", e); 83 } 84 } 85 }; 86 } 87
