Android 图片闪烁(延迟切换)

<LinearLayout 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"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <ViewFlipper
        android:id="@+id/flipper"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginTop="10dp"
        android:flipInterval="200" >

        <TextView
            android:id="@+id/text_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="text_1" />

        <TextView
            android:id="@+id/text_2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="text_12" />

        <TextView
            android:id="@+id/text_3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="text_13" />

        <TextView
            android:id="@+id/text_4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="text_14" />
    </ViewFlipper>

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="stop" />

</LinearLayout>

package com.example.demoviewfliper;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ViewFlipper;

public class MainActivity extends Activity {
    ViewFlipper mVf;
    Button btn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mVf = (ViewFlipper) findViewById(R.id.flipper);
        mVf.startFlipping();

        btn = (Button) findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (mVf != null && mVf.isFlipping()) {
                    mVf.stopFlipping();
                    mVf.setDisplayedChild(mVf.getChildCount() - 1);
                }

            }
        });
    }

}