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

巴特西

android动画之通过子线程来实现动画

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