Android線程和handler

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　　根據視頻仿照著寫了個demo:

package com.wyl.wylthreadtest;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v4.app.Fragment;import android.support.v7.app.ActionBarActivity;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.Button;import android.widget.TextView;public class MainActivity extends ActionBarActivity {TextView textView;Button button;Handler myhandler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        textView = (TextView)findViewById(R.id.textViewId);        button = (Button)findViewById(R.id.buttonId);        myhandler = new myHandler();                buttonListener listener = new buttonListener();        button.setOnClickListener(listener);    }    /**     * 添加button的onclick監聽器     * @author Administrator     *     */    class buttonListener implements OnClickListener{    @Override    public void onClick(View view) {//    textView.setText("我的女神");//    textView.setTextColor(Color.GRAY);//    System.out.println("buttonListener："+Thread.currentThread().getName());        myThread mythread = new myThread();    System.out.println("buttonListener："+Thread.currentThread().getName());    mythread.start();//    mythread.run();    }        }    /**     * 實現自己的一個線程，類比從網路上擷取資料然後傳給handler     * @author Administrator     *     */    class myThread extends Thread{    String name = "類比從網路上擷取資料然後傳給handler";        @Override    public void run() {    try {sleep(1*1000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}    System.out.println("myThead 子線程"+Thread.currentThread().getName());                Message msg = myhandler.obtainMessage();    msg.obj = name;    myhandler.sendMessage(msg);    }            }            /**     * handler繼承Handler父類     * @author Administrator     *     */    class myHandler extends Handler{    @Override    public void handleMessage(Message msg) {    System.out.println("myHandler:"+Thread.currentThread().getName());    String name = (String)msg.obj;    textView.setText(name);    }        }    @Override    public boolean onCreateOptionsMenu(Menu menu) {                // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    /**     * A placeholder fragment containing a simple view.     */    public static class PlaceholderFragment extends Fragment {        public PlaceholderFragment() {        }        @Override        public View onCreateView(LayoutInflater inflater, ViewGroup container,                Bundle savedInstanceState) {            View rootView = inflater.inflate(R.layout.fragment_main, container, false);            return rootView;        }    }}

　　如下：

Android線程和handler