ViewFlipper的简单用法

2023-03-09 08:14:00

ViewFlipper和ViewPager挺像的，都是一个view容器。内部可以添加多个view，只是viewpager可以通过左右滑动来切换view，而viewFlipper则没有这个功能，所以需要在它上面监听手势。比较方便的是它不用使用适配器就能添加view，所以比较方便。

首先在布局文件中定义这个控件：

<?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="#ffffff">

    <ViewFlipper android:id="@+id/ViewFlipper01"

        android:layout_width="match_parent"

        android:layout_height="match_parent"/>

</LinearLayout>

2.在代码中找到并且添加view

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        detector = new GestureDetector(this);

        flipper = (ViewFlipper) this.findViewById(R.id.ViewFlipper01);

        flipper.addView(addTextView("page 1"));//添加view到flipper中，这里添加5个textView

        flipper.addView(addTextView("page 2"));

        flipper.addView(addTextView("page 3"));

        flipper.addView(addTextView("page 4"));

        flipper.addView(addTextView("page 5"));

    }

/**

     * @param text

     * @return 一个textView对象

     */

    private View addTextView(String text) {

        TextView tv = new TextView(this);

        tv.setText(text);

        tv.setTextSize(40);

        tv.setTextColor(0xff000000);

        tv.setGravity(Gravity.CENTER);

        return tv;

    }

3.通过touch监听手势来切换view

@Override

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

            float velocityY) {

        if (e1.getX() - e2.getX() > 120) {

            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));

            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));

            this.flipper.showNext();//切换到下一个view

            return true;

        } else if (e1.getX() - e2.getX() < -120) {

            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));

            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));

            this.flipper.showPrevious();

            return true;

        }

        return false;

    }

下面是Activity的完整代码：

package com.xu81.testflip;

import android.app.Activity;

import android.app.ActivityManager.RecentTaskInfo;

import android.os.Bundle;

import android.view.GestureDetector;

import android.view.Gravity;

import android.view.MotionEvent;

import android.view.View;

import android.view.GestureDetector.OnGestureListener;

import android.view.animation.AnimationUtils;

import android.widget.TextView;

import android.widget.ViewFlipper;

public class TestFlip extends Activity implements OnGestureListener {

    private ViewFlipper flipper;

    private GestureDetector detector;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        detector = new GestureDetector(this);

        flipper = (ViewFlipper) this.findViewById(R.id.ViewFlipper01);

        flipper.addView(addTextView("page 1"));//添加view到flipper中，这里添加5个textView

        flipper.addView(addTextView("page 2"));

        flipper.addView(addTextView("page 3"));

        flipper.addView(addTextView("page 4"));

        flipper.addView(addTextView("page 5"));

    }

    /**

     * @param text

     * @return 一个textView对象

     */

    private View addTextView(String text) {

        TextView tv = new TextView(this);

        tv.setText(text);

        tv.setTextSize(40);

        tv.setTextColor(0xff000000);

        tv.setGravity(Gravity.CENTER);

        return tv;

    }

    @Override

    public boolean onTouchEvent(MotionEvent event) {

        return this.detector.onTouchEvent(event);

    }

    @Override

    public boolean onDown(MotionEvent e) {

        // TODO Auto-generated method stub

        return false;

    }

    @Override

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

            float velocityY) {

        if (e1.getX() - e2.getX() > 120) {

            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));

            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));

            this.flipper.showNext();//切换到下一个view

            return true;

        } else if (e1.getX() - e2.getX() < -120) {

            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));

            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));

            this.flipper.showPrevious();

            return true;

        }

        return false;

    }

    @Override

    public void onLongPress(MotionEvent e) {

        // TODO 自动生成的方法存根

    }

    @Override

    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,

            float distanceY) {

        // TODO 自动生成的方法存根

        return false;

    }

    @Override

    public void onShowPress(MotionEvent e) {

        // TODO 自动生成的方法存根

    }

    @Override

    public boolean onSingleTapUp(MotionEvent e) {

        // TODO 自动生成的方法存根

        return false;

    }

}

动画文件：

push_left_in.xml

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

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

    <translate android:fromXDelta="100%p" android:toXDelta="0"

        android:duration="500" />

    <alpha android:fromAlpha="0.1" android:toAlpha="1.0"

        android:duration="500" />

</set>

push_left_out.xml

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

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

    <translate android:fromXDelta="0" android:toXDelta="-100%p"

        android:duration="500" />

    <alpha android:fromAlpha="1.0" android:toAlpha="0.1"

        android:duration="500" />

</set>

push_right_in.xml

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

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

    <translate android:fromXDelta="-100%p" android:toXDelta="0"

        android:duration="500" />

    <alpha android:fromAlpha="0.1" android:toAlpha="1.0"

        android:duration="500" />

</set>

push_right_out.xml

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

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

    <translate android:fromXDelta="0" android:toXDelta="100%p"

        android:duration="500" />

    <alpha android:fromAlpha="1.0" android:toAlpha="0.1"

        android:duration="500" />

</set>

源码下载：http://download.csdn.net/detail/shark0017/7962673

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