今天碰到一個問題,就是一個應用activity向另一個應用的service傳送數據。AIDL肯定每個人都會知道。不過AIDL個人感覺有點麻煩,就想着能不能用廣播發送數據。於是,動手寫了Demo,經測試,在同一個開發板上,一個應用通過廣播向另一個應用發送數據,另一個應用能夠接收到數據的。
Demo如下:
應用一:
package com.example.activity1;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button) findViewById(R.id.send);
btn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.send:
Toast.makeText(MainActivity.this, "開始發送廣播", Toast.LENGTH_SHORT).show();
Intent intent = new Intent("SEND_BROCAST");
intent.putExtra("value", 2);
MainActivity.this.sendBroadcast(intent);
break;
}
}
}
package com.example.activity2;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.startService(new Intent(MainActivity.this, receiveService.class));
}
}
這個應用中的service:
package com.example.activity2;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
public class receiveService extends Service{
private ComandReceiver cr;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
cr = new ComandReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction("SEND_BROCAST");
registerReceiver(cr, filter);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
public class ComandReceiver extends BroadcastReceiver{
public int status;
@Override
public void onReceive(Context context, Intent intent) {
status = intent.getIntExtra("value", -1);
System.out.println(status);
}
}
}
打印結果如下:
activity與service交互的方法: 通過廣播(兩者可以互相發送),好用!!!