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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;
@Override
protected 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;
}
@Override
public void handleMessage(Message msg) {
// 更新ui
view.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;
}
@Override
public void run() {
// TODO Auto-generated method stub
try {
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
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原文地址：http://www.cnblogs.com/futureli/p/4621867.html
