Android鬧鐘-AlarmManager

AlarmManager提供了一種系統級的提示服務，允許你安排在將來的某個時間執行一個服務。AlarmManager對象一般通過Context.getSystemService(Context.ALARM_SERVICE)方法獲得。

下面看一個例子加深理解：<喎?http://www.bkjia.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+PC9wPgo8cHJlIGNsYXNzPQ=="brush:java;">package com.app;import com.app.R;import android.app.Activity;import android.app.AlarmManager;import android.app.PendingIntent;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;/** * * 測試AlarmManager */public class MainActivity extends Activity {// 聲明Buttonprivate Button setBtn, cancelBtn;// 定義廣播Actionprivate static final String BC_ACTION = "com.action.BC_ACTION";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// 設定當前布局視圖setContentView(R.layout.main);// 執行個體化ButtonsetBtn = (Button) findViewById(R.id.Button01);cancelBtn = (Button) findViewById(R.id.Button02);// 獲得AlarmManager執行個體final AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);// 執行個體化IntentIntent intent = new Intent();// 設定Intent action屬性intent.setAction(BC_ACTION);intent.putExtra("msg", "你該去開會啦！");// 執行個體化PendingIntentfinal PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0,intent, 0);// 獲得系統時間final long time = System.currentTimeMillis();// 設定按鈕單擊事件setBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// 重複提示，從目前時間開始，間隔5秒am.setRepeating(AlarmManager.RTC_WAKEUP, time,5 * 1000, pi);}});// 設定按鈕單擊事件cancelBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {am.cancel(pi);}});}}

註：PendingIntent的一個靜態方法，

getBroadcast

public static PendingIntent getBroadcast(Context context,                                         int requestCode,                                         Intent intent,                                         int flags)

Retrieve a PendingIntent that will perform a broadcast, like calling Context.sendBroadcast().

參數： context - The Context in which this PendingIntent should perform the broadcast. requestCode - Private request code for the sender (currently not used). intent - The Intent to be broadcast. flags - May be FLAG_ONE_SHOT, FLAG_NO_CREATE, FLAG_CANCEL_CURRENT, FLAG_UPDATE_CURRENT, or any of the flags as supported by Intent.fillIn() to control which unspecified parts of the intent that can be supplied when the actual send happens. 返回：Returns an existing or new PendingIntent matching the given parameters. May return null only if FLAG_NO_CREATE has been supplied.

package com.app;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class MyReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// 獲得提示資訊String msg = intent.getStringExtra("msg");// 顯示提示資訊Toast.makeText(context, msg, Toast.LENGTH_LONG).show();}}

別忘了在AndroidManifest.xml中註冊MyReceiver:

結果：