Android的四大组件是不是运行在主线程中?打了log,做个笔记.

先上图:

图没有说服力,因为log是我写的.哈哈.

1.activity

在onCreate()里面打印当前的线程的id和name

	@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); startService = (Button) findViewById(R.id.startService); startService.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Log.e("test", "开启服务....."); startService(new Intent(MainActivity.this, MyService.class)); } }); sendBroadcast = (Button) findViewById(R.id.sendBroadcast); sendBroadcast.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Log.e("test", "发送广播....."); Intent intent = new Intent(); intent.setAction("com.dingzhipeng"); intent.putExtra("name", "dingzhipeng"); MainActivity.this.sendBroadcast(intent); } }); String threaName = Thread.currentThread().getName(); long threaId = Thread.currentThread().getId(); Log.e("test", "activity..."); Log.e("test", "activity_threadId: " + threaId); Log.e("test", "activity_threadName: " + threaName); }

2.Service
同上,在onCreate()里面打印当前的线程的id和name

public class MyService extends Service {

	@Override
	public IBinder onBind(Intent arg0) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		String threaName = Thread.currentThread().getName();
		long threaId = Thread.currentThread().getId();
		Log.e("test", "service_threadId: " + threaId);
		Log.e("test", "service_threadName: " + threaName);
	}
}

3.ContentProvider

manifest.xml中记得配置.log也是简单暴力

public class MyProvider extends ContentProvider {

	@Override
	public int delete(Uri uri, String selection, String[] selectionArgs) {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public String getType(Uri uri) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public Uri insert(Uri uri, ContentValues values) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public boolean onCreate() {
		String threaName = Thread.currentThread().getName();
		long threaId = Thread.currentThread().getId();
		Log.e("test", "内容提供者...");
		Log.e("test", "ContentProvider_threadId: " + threaId);
		Log.e("test", "ContentProvider_threadName: " + threaName);
		return false;
	}

	@Override
	public Cursor query(Uri uri, String[] projection, String selection,
			String[] selectionArgs, String sortOrder) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public int update(Uri uri, ContentValues values, String selection,
			String[] selectionArgs) {
		// TODO Auto-generated method stub
		return 0;
	}



}

4.BroadcastReceiver

在广播接收者中打log

public class MyReceiver extends BroadcastReceiver {
	@Override
	public void onReceive(Context arg0, Intent arg1) {
		String name = arg1.getExtras().getString("name");
		Log.e("test", "接收到name: " + name);
		String threaName = Thread.currentThread().getName();
		long threaId = Thread.currentThread().getId();
		Log.e("test", "BroadcastReceiver_threadId: " + threaId);
		Log.e("test", "BroadcastReceiver_threadName: " + threaName);
	}
}

总结:在activity,service,contentprovider的oncreate()中打印log,获取的当前线程都是主线程,在broadcastreceiver的onReceiver()中当前线程也是主线程,四大组件都是运行在主线程中.

demo源码下载

我的博客:http://blog.csdn.net/qq_31383345
欢迎批评!

原文链接：https://blog.csdn.net/qq_31383345/article/details/53303823

本站声明:网站内容来源于网络,如有侵权,请联系我们,我们将及时处理。