android动画之通过子线程来实现动画

使用android动画机制，往往是相对于原始位置来进行参照。

这里通过子线程修改物体位置实现动画。

布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <TextView        android:id="@+id/show"        android:layout_marginLeft="20dp"        android:layout_marginTop="40dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" />    <Button        android:id="@+id/button1"        android:onClick="MyCLick"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_alignParentRight="true"        android:text="行动" />    <Button        android:id="@+id/button2"        android:onClick="MyCLick"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_marginRight="28dp"        android:layout_toLeftOf="@+id/button1"        android:text="获取位置" /></RelativeLayout>

动画代码：

public class MainActivity extends Activity {TextView textView;MyRuns myRuns;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textView = (TextView) findViewById(R.id.show);myRuns=new MyRuns(new MyHead(textView, 4, 8), true);//位移动画}static class MyHead extends Handler {// 坐标动画View view;// 操作元素float cx;float cy;public MyHead(View view, float cx, float cy) {super();this.view = view;this.cx = cx;this.cy = cy;}@Overridepublic void handleMessage(Message msg) {// 更新uiview.setX(view.getX() + cx);view.setY(view.getY() + cy);super.handleMessage(msg);}}// 子线程更新位置class MyRuns implements Runnable {//更新UI界面MyHead head;boolean isFire = false;public MyRuns(MyHead head, boolean isFire) {super();this.head = head;this.isFire = isFire;}public boolean isFire() {return isFire;}public void setFire(boolean isFire) {this.isFire = isFire;}@Overridepublic void run() {// TODO Auto-generated method stubtry {while (true) {if (!isFire) {break;//停止动画}Thread.sleep(80);Message message = new Message();message.what = 3;message.obj = "";head.sendMessage(message);}} catch (Exception e) {// TODO: handle exception}}}//开始运动void StartThreed(MyRuns myRuns){myRuns.setFire(true);//开启new Thread(myRuns).start();}public void MyCLick(View view) {if (view.getId() == R.id.button1) {StartThreed(myRuns);} else if (view.getId() == R.id.button2) {myRuns.setFire(false);//结束子线程Toast.makeText(getApplicationContext(),"坐标" + textView.getX() + "||" + textView.getY(),Toast.LENGTH_SHORT).show();}}}

原文地址：http://sijienet.com/bbs/?leibie=showinfo&id=57

android动画之通过子线程来实现动画

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