Android学习札记30：线程更新UI界面的4种方法

public void onClick( View v ) {
new Thread( new Runnable() {
public void run() {
// 耗时操作
doLongOperation();

myText.post(new Runnable() {
myText.setText( 来自网络的信息);
});
}
}).start();
}

public void onClick( View v ) {
new Thread(new Runnable() {
public void run() {
// 耗时操作
doLongOperation();

Activity.runOnUiThread(new Runnable() {
myText.setText( 来自网络的信息);
});
}
}).start();
}

mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// 更新界面
myText.setText(接收到的Message);
}
};

public class MyThread extends Thread {
public void run() {
// 耗时操作
doLongOperation();

Message msg = new Message();
mHandler.sendMessage(msg);
}
}

// UI线程中执行
new DownloadImageTask().execute("");

private class LoadTask extends AsyncTask {
protected String doInBackground(String... url) {
return loadDataFormNetwork( url[0] );//后台耗时操作
}

protected void onPostExecute(String result) {
myText.setText( result ); //得到来自网络的信息刷新页面
}
}