android background service 範例 @ 鏡花水月-什麼是真?什麼是假?

android background service 是背景程式執行

只要你有開啟APP，即使你返回桌面，做其他事

他仍然會繼續執行

通常能用來做手機訊息通知的用途

以下是我的程式碼

MainActivity.java

@SuppressLint("NewApi")
public class MainActivity extends Activity {
   @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
  find();
}
private EditText acc;
private void find() {
   acc=(EditText)findViewById(R.id.acc);
    acc.setText("aaa");
    Intent intent2 = new Intent(MainActivity.this, myservice.class);
    intent2.putExtra("ACCOUNT", name_str);
startService(intent2);

}
}

接下來是myservice.java

@SuppressLint("NewApi") public class myservice extends Service {
private Handler handler = new Handler();
String account="q";
@Override
public IBinder onBind(Intent intent) {
return null;
}

private Intent getIntent() {
return null;
}

@Override
public void onStart(Intent intent, int startId) {
account = intent.getStringExtra("ACCOUNT");
handler.postDelayed(showTime, 1000);
super.onStart(intent, startId);
}

@Override
public void onDestroy() {
handler.removeCallbacks(showTime);
super.onDestroy();
}
private void testNotification() {
   Notification.Builder builder = new Notification.Builder(this);
   builder.setSmallIcon(R.drawable.ic_launcher)
   .setPriority(Notification.PRIORITY_HIGH)
   .setOngoing(false);
   builder.setContentText("待簽核");
   NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
   manager.notify(1, builder.build());
   }
private Runnable showTime = new Runnable() {
public void run() {
  testNotification();
handler.postDelayed(this, 1000);
}
};
}