Android Hander的使用

//第一种使用new Thread() {public void Run() {try {mHandler.post(new Runnable() {@Overridepublic void run() {// TODO 自动生成的方法存根TxtView.setText("asdasd");}});Thread.sleep(1000);} catch (InterruptedException e) {// TODO 自动生成的 catch 块e.printStackTrace();}}}.start();;

//第二种

MyRunable mMyRunable=new MyRunable();public class MyRunable implements Runnable{@Overridepublic void run() {ImageIndex++;ImageIndex=ImageIndex%3;Img.setImageResource(ImageID[ImageIndex]);mHandler.postDelayed(mMyRunable, 1);}}

mHandler.postDelayed(mMyRunable, 1);

//第三种

Handler mHandler3=new Handler(new Handler.Callback() {@Overridepublic boolean handleMessage(Message msg) {Toast.makeText(getApplicationContext(), ""+1, Toast.LENGTH_SHORT).show();return false;}}){public void handleMessage(Message msg){Toast.makeText(getApplicationContext(), ""+2, Toast.LENGTH_SHORT).show();}};

mHandler3.sendEmptyMessage(10000);

//第四种

Handler mHandler2=new Handler(){@Overridepublic void handleMessage(Message msg) {TxtView.setText(msg.arg1+"-"+msg.arg2+"-"+msg.obj);}};

Message message=new Message();message.arg1=88;message.arg2=100;message.obj=100;//任意OBJECT类型  实体类mHandler2.sendMessage(message);

Hnader Looper MessageQueue 之间的关系

Hnader负责发送消息 Looper负责接收Hnader发送的消息并直接把消息回传给Hnader自己，MessageQueue就是一个储存消息的容器

HandlerThread 的用法

private TextView mTextView;private HandlerThread mHandlerThread;private Handler mHandler;

mTextView=(TextView)findViewById(R.id.id_txt);mHandlerThread=new HandlerThread("ThreadName");mHandlerThread.start();mHandler=new Handler(mHandlerThread.getLooper()){@Overridepublic void handleMessage(Message msg) {mTextView.setText("ThreadName------------"+Thread.currentThread());}};mHandler.sendEmptyMessage(1);

主线程与子线程之间的信息交互

private TextView mTextView;private TextView mTextView2;private Button Btn1;private Button Btn2;// 主线程的Handlerprivate Handler MainHandler = new Handler() {public void handleMessage(Message msg) {Message msgMessage =new Message();mTextView2.setText("住线程");threadHandler.sendMessageDelayed(msgMessage, 1000);};};// 子线程Handlerprivate Handler threadHandler;

mTextView = (TextView) findViewById(R.id.id_txt);mTextView2 = (TextView) findViewById(R.id.id_txt2);Btn1 = (Button) findViewById(R.id.button1);Btn2 = (Button) findViewById(R.id.button2);HandlerThread mHandlerThread = new HandlerThread("MainThread");mHandlerThread.start();threadHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {   Message msgMessage =new Message();   mTextView2.setText("子线程");   MainHandler.sendMessageDelayed(msgMessage, 1000);}};Btn1.setOnClickListener(new OnClickListener() {public void onClick(View v) {MainHandler.sendEmptyMessage(1);}});Btn2.setOnClickListener(new OnClickListener() {public void onClick(View v) {MainHandler.removeMessages(1);threadHandler.removeMessages(1);}});

Android中更新UI的几种方式

//第一种

private Handler mHandler=new Handler(){public void handleMessage(Message msg) {};};

//第一种  通过Hnadler更新UInew Thread(){public void run() {try {Thread.sleep(2000);} catch (InterruptedException e) {// TODO 自动生成的 catch 块e.printStackTrace();}mHandler.post(new Runnable() {@Overridepublic void run() {mTextView.setText("asdasd");}});};}.start();

//第二种更新UI的方法

private Handler mHandler=new Handler(){public void handleMessage(Message msg) {mTextView.setText("asdasd");};};

new Thread(){public void run() {try {Thread.sleep(2000);} catch (InterruptedException e) {// TODO 自动生成的 catch 块e.printStackTrace();}Handler2();};}.start();

public void Handler2(){mHandler.sendEmptyMessage(1);}

//第三种是用内置函数在子线程中直接调用

public void UpdayeUI(){runOnUiThread(new Runnable() {@Overridepublic void run() {mTextView.setText("asdasd");}});}

//第四种使用控件自带的方法更新在子线程中直接调用

public void ViewUI(){mTextView.post(new Runnable() {@Overridepublic void run() {mTextView.setText("asdasd");}});}

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