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Android 更新UI的几种方式

2017-08-03 16:11 393 查看

下面四种其实最终都还是用的Handler

1、Activity: runOnUiThread方法

new Thread(new Runnable() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
}
});
}
}).start();

2、Handler： sendEmptyMessage()方法

public class MainActivity extends BaseActivity {
private TextView textView;
private Handler handler = new Handler( ) {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
textView.setText( "********");
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.message_tv);
handler.sendEmptyMessage(0);
}
}

3、Handler： post()方法

public class MainActivity extends BaseActivity {
private TextView textView;
private Handler handler = new Handler();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.message_tv);
handler.post(new Runnable() {
@Override
public void run() {
textView.setText( "********");
}
});
}
}

4、View: post()方法

public class MainActivity extends BaseActivity {
private TextView textView;
private Handler handler = new Handler();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.message_tv);
textView.post(new Runnable() {
@Override
public void run() {
textView.setText( "**********");
}
});
}
}

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