[英]android Broadcast Receiver not works
我使用android studio進行編程,我希望每次時鍾更改時(例如,電話時間從3:13
更改為3:14
每一分鍾),都需要廣播接收器來執行某項操作,即使該程序沒有運行。 所以我應該將廣播接收器與Time_Tick
Action配合使用。 但是它僅在活動創建時起作用。 任何想法?
主要活動:
public class MainActivity extends ActionBarActivity {
BroadcastReceiver br;
final SmsManager sms = SmsManager.getDefault();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter i=new IntentFilter();
i.addAction("android.intent.action.TIME_TICK");
registerReceiver(new MyReceiver(),i);
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MyReceiver:
public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
Log.i("Saaalam","saaaalaalam");
}
@Override
public void onReceive(Context context, Intent intent) {
// TODO: This method is called when the BroadcastReceiver is receiving
// an Intent broadcast.
throw new UnsupportedOperationException("Not yet implemented");
}
}
表現:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.etsiamak.broadcastrecierver" >
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="ANDROID.PERMISSION.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".MyReceiver"
android:enabled="true"
android:exported="true" >
<intent-filter> <action android:name="android.intent.action.TIME_TICK"></action> </intent-filter>
</receiver>
</application>
</manifest>
這是時間刻度的示例代碼。 TIME_TICK意圖被更改為分鍾更改。
靜態TimeReceiver tickReceiver = new TimeReceiver();
void setTimeTick()
{
registerReceiver(tickReceiver, new IntentFilter(
"android.intent.action.TIME_TICK"));
Toast.makeText(this, "Registered broadcast receiver", Toast.LENGTH_SHORT)
.show();
//Register the broadcast receiver to receive TIME_TICK
registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));
}
收信人階層
class TimeReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent arg1) {
// TODO Auto-generated method stub
Toast.makeText(context, "Time tick", Toast.LENGTH_LONG).show();
}
}
您可以將此代碼添加到清單中嗎
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
據我了解,您需要在一定時間(例如一分鍾)后執行某些任務。 為此,您可以使用AlarmManager 。
AlarmManager myAlarmManager = Context.getSystemService(Context.ALARM_SERVICE)
AlarmManager的示例: https ://androidresearch.wordpress.com/2012/07/02/scheduling-an-application-to-start-later/
或Android在Android 5.0(API 21)中引入了JobScheduler API。 最好使用AlarmManager,因為它不會考慮設備是連接到電源插頭,閑置還是已連接。
JobScheduler示例: 如何使用 Androids Job Scheduler
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