handler

方法一: handler. post

package com.handler.one;


import com.example.test02.R;
import com.example.test02.R.id;
import com.example.test02.R.layout;


import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;


public class HandlerOneActivity extends Activity {


private String LOGTAG = "HandlerOneActivity";
private TextView txt1;
private Handler uiHandler = new Handler();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_handler_one);
Log.i(LOGTAG, "Thread id " + Thread.currentThread().getId());
txt1 = (TextView)findViewById(R.id.txt1);
Button btn1 = (Button)findViewById(R.id.btn1);
btn1.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
DoThread mythread = new DoThread();
mythread.start();
}
});
}


private class DoThread extends Thread {

public void run(){
Log.i(LOGTAG, "Thread id " + Thread.currentThread().getId());
Log.i(LOGTAG, "start do");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(LOGTAG, "finish do");
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
        Log.i(LOGTAG, "Thread id " + Thread.currentThread().getId());
        HandlerOneActivity.this.txt1.setText("完成");
                }
            };
            uiHandler.post(runnable);
}
}
}

方法二： sendMessage

    private Handler handler = new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(Message arg0) {
            return false;
        }
    });



private class DoThread extends Thread {

public void run(){
Log.i(LOGTAG, "Thread id " + Thread.currentThread().getId());
Log.i(LOGTAG, "start do");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(LOGTAG, "finish do");
Message msg = new Message();
msg.what = 1;
msg.arg1 = 123;
msg.arg2 = 456;
Bundle data = new Bundle();
data.putString("k1", "key1");
msg.setData(data);
            uiHandler.sendMessage(msg);
}
}


}