Android 启动界面的实现（转载）

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package wht.android.loading;

import android.content.Context;

import android.graphics.Canvas;

import android.util.AttributeSet;

import android.widget.ImageView;

public class LoadingView extends ImageView implements Runnable

{

        private boolean isStop = false;

        private int[] imageIds;

        private int index = 0;

        private int length = 1;

        public LoadingView(Context context)

        {

                this(context, null);

        }

        public LoadingView(Context context, AttributeSet attrs)

        {

                super(context, attrs);

        }

        public void setImageIds(int[] imageId)

        {

                this.imageIds = imageId;

                if(imageIds != null && imageIds.length > 0)

                {

                        length = imageIds.length;

                }

        }

                @Override

        protected void onDetachedFromWindow()

        {

                // TODO Auto-generated method stub

                super.onDetachedFromWindow();

                isStop = true;

        }

        @Override

        protected void onDraw(Canvas canvas)

        {

                // TODO Auto-generated method stub

                super.onDraw(canvas);

                if(imageIds != null && imageIds.length > 0)

                {

                        this.setImageResource(imageIds[index]);

                }

        }

        @Override

        public void run()

        {

                while(!isStop)

                {

                        index = ++index % length;

                        postInvalidate();

                        try

                        {

                                Thread.sleep(400);

                        }

                        catch (InterruptedException e)

                        {

                                e.printStackTrace();

                        }

                }

        }

        public void startAnim()

        {

                new Thread(this).start();

        }

}

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package wht.android.loading;

import android.app.Activity;

import android.os.Bundle;

public class MainActivity extends Activity

{

    private LoadingView main_imageview;

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        main_imageview = (LoadingView)findViewById(R.id.main_imageview);

        initLoadingImages();

        new Thread()

        {

            @Override

            public void run()

            {

                main_imageview.startAnim();

            }

        }.start();

    }

    private void initLoadingImages()

    {

        int[] imageIds = new int[6];

        imageIds[0] = R.drawable.loader_frame_1;

        imageIds[1] = R.drawable.loader_frame_2;

        imageIds[2] = R.drawable.loader_frame_3;

        imageIds[3] = R.drawable.loader_frame_4;

        imageIds[4] = R.drawable.loader_frame_5;

        imageIds[5] = R.drawable.loader_frame_6;

        main_imageview.setImageIds(imageIds);

    }

}

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

        android:orientation="vertical" android:layout_width="fill_parent"

        android:layout_height="fill_parent" android:background="#e1e1e1">

        <wht.android.loading.LoadingView

                android:layout_gravity="center_horizontal" android:layout_height="wrap_content"

                android:id="@+id/main_imageview" android:src="@drawable/loader_frame_1"

                android:layout_marginTop="190dp" android:layout_width="wrap_content"

                ></wht.android.loading.LoadingView>

<TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="启动中..."

        android:layout_marginTop="10dip"

        android:textColor="#666666"

        android:layout_gravity="center_horizontal"

        android:textSize="20sp"

/>

</LinearLayout>