Android中在子线程中更新UI

1、Activity的 runOnUiThread  

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textView = (TextView) findViewById( R.id.tv );        new Thread(new Runnable() {            @Override            public void run() {                  runOnUiThread(new Runnable() {                    @Override                    public void run() {                        textView.setText( "更新UI了");                    }                });            }        }).start();

android Activity runOnUiThread() 方法使用

2、Handler sendEmptyMessage()

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package lib.com.myapplication;   import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {       private TextView textView ;       Handler handler = new Handler( ) {         @Override         public void handleMessage(Message msg) {             super.handleMessage(msg);             textView.setText( "Ui更新了");         }     };       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           textView = (TextView) findViewById( R.id.tv );         new Thread(new Runnable() {             @Override             public void run() {                 try {                     Thread.sleep( 2000 );                 } catch (InterruptedException e) {                     e.printStackTrace();                 }                   handler.sendEmptyMessage( 2 ) ;             }         }).start();       } }

3、Handler  post()

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package lib.com.myapplication; import android.os.Bundle; import android.os.Handler; import android.support.v7.app.AppCompatActivity; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {       private TextView textView ;       Handler handler = new Handler();       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           textView = (TextView) findViewById( R.id.tv );           new Thread(new Runnable() {             @Override             public void run() {                 try {                     Thread.sleep( 2000 );                 } catch (InterruptedException e) {                     e.printStackTrace();                 }                   handler.post(new Runnable() {                     @Override                     public void run() {                         textView.setText( "Ui更新了");                     }                 }) ;             }         }).start();       } }

4、view Post()　

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textView = (TextView) findViewById( R.id.tv );        new Thread(new Runnable() {            @Override            public void run() {                try {                    Thread.sleep( 2000 );                } catch (InterruptedException e) {                    e.printStackTrace();                }                  textView.post(new Runnable() {                    @Override                    public void run() {                        textView.setText( "Ui更新了");                    }                }) ;            }        }).start();