Android的ViewFlipper不翻转 [英] Android ViewFlipper not flipping

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本文介绍了Android的ViewFlipper不翻转的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个ViewFlipper应该反应一扔姿态，但事实并非如此。

活动

  @覆盖
公共无效的onCreate（包savedInstanceState）{
    ...
    ListView控件= this.getListView（）;
    探测器=新GestureDetector（这一点，新FlingGestureListener（ListView中））;
    ...
}

FlingGestureListener 

 公共布尔onFling（MotionEvent E1，E2 MotionEvent，浮velocityX，浮velocityY）{
    INT POS = source.pointToPosition（Math.round（e1.getX（）），Math.round（e1.getY（）））;
    视图V = source.getChildAt（POS  -  source.getFirstVisiblePosition（））;
    的System.out.println（一扔：X =+ velocityX +Y =+ velocityY）;
    尝试 {
        IFlingable flingable =（IFlingable）V;
        如果（velocityY＆GT; -200＆安培;＆安培; velocityY＆所述; 200）{
            如果（velocityX℃，）
                flingable.fling（IFlingable.RIGHT_TO_LEFT）;
            否则如果（velocityX大于0）
                flingable.fling（IFlingable.LEFT_TO_RIGHT）;
        }
    }赶上（例外五）{}
    返回false;
}

查看与ViewFlipper它实现IFlingable 

 公共无效一扔（INT方向）{
    的System.out.println（翻转+方向）;
    开关（方向）{
        案例IFlingable.LEFT_TO_RIGHT：
            的System.out.println（piep）;
            GUIHelper.setAnimationSlideLeftToRight（背景下，切换器）;
            switcher.showNext（）;
            打破;
        案例IFlingable.RIGHT_TO_LEFT：
            的System.out.println（小狗）;
            GUIHelper.setAnimationSlideRightToLeft（背景下，切换器）;
            switcher.show previous（）;
            打破;
    }
}

布局

 ＆LT; ViewFlipper机器人：ID =@ + ID / viewSwitcher
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_width =match_parent机器人：layout_weight =1
    机器人：inAnimation =@动画/ slide_in_left
    机器人：outAnimation =@动画/ slide_out_right＆GT;
        ＆LT; LinearLayout中的android：layout_height =WRAP_CONTENT
           机器人：layout_width =match_parent机器人：方向=垂直＆GT;
             ...
        ＆LT; / LinearLayout中＆GT;
      ...
    ＆LT; / ViewFlipper＆GT;

登录

 一扔：X = 2542.3613 Y = 95.877945
翻转：0
piep

我上ViewFlipper被执行权日志消息所以showNext（），但它不改变其在GUI视图。我失去了一些东西？我还有一个版面与ViewSwitcher而不是翻转和一件作品。

编辑：

下面是缺少类：

 公共类GUIHelper {
...

公共静态无效setAnimationSlideLeftToRight（上下文的背景下，ViewAnimator转换器）{
    动画= AnimationUtils.loadAnimation（背景下，R.anim.slide_in_left）;
    动画OUT = AnimationUtils.loadAnimation（背景下，R.anim.slide_out_right）;
    switcher.setInAnimation（在）;
    switcher.setOutAnimation（出）;
}

公共静态无效setAnimationSlideRightToLeft（上下文的背景下，ViewAnimator转换器）{
    动画= AnimationUtils.loadAnimation（背景下，R.anim.slide_in_right）;
    动画OUT = AnimationUtils.loadAnimation（背景下，R.anim.slide_out_left）;
    switcher.setInAnimation（在）;
    switcher.setOutAnimation（出）;
}

...
}

公共接口IFlingable {

    公共静态最终诠释LEFT_TO_RIGHT = 0;
    公共静态最终诠释RIGHT_TO_LEFT = 1;

    公共无效一扔（INT方向，布尔一扔）;

}

解决方案

您好，这是对的ListView运行刷卡code就像你的XML我已经把一个ListView与父母的LinearLayout在ViewFlipper 

 进口android.app.Activity;
进口android.os.Bundle;

进口android.view.GestureDetector;

进口android.view.GestureDetector.SimpleOnGestureListener;

进口android.view.MotionEvent;

进口android.view.View;
进口android.view.animation.Animation;
进口android.view.animation.AnimationUtils;
进口android.widget.AdapterView;
进口android.widget.ArrayAdapter;
进口android.widget.ListView;
进口android.widget.Toast;
进口android.widget.ViewFlipper;

进口android.widget.AdapterView.OnItemClickListener;


公共类MainActivity延伸活动{

    私有静态最终诠释SWIPE_MIN_DISTANCE = 120;
    私有静态最终诠释SWIPE_MAX_OFF_PATH = 250;
    私有静态最终诠释SWIPE_THRESHOLD_VELOCITY = 200;
    私人GestureDetector gestureDetector;
    View.OnTouchListener gestureListener;
    民营动画slideLeftIn;
    民营动画slideLeftOut;
    民营动画slideRightIn;
    民营动画slideRightOut;
    私人ViewFlipper viewFlipper;
    私人的ListView LV;
    私有String []市= {多尔，博帕尔，Khargone，乌贾因，
        纳西克，普那，德里，孟买，诺依，海得拉巴，
        班加罗尔，阿杰梅尔，阿，斋浦尔，那格浦尔，};
    私有String []国家= {印度，不丹，科威特，USA，};

    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main_layout）;
        LV =（ListView控件）findViewById（R.id.List01）;
        ListView控件LV2 =（ListView控件）findViewById（R.id.List02）;

        viewFlipper =（ViewFlipper）findViewById（R.id.flipper）;
        slideLeftIn = AnimationUtils.loadAnimation（这一点，R.anim.slide_left_in）;
        slideLeftOut = AnimationUtils
                .loadAnimation（这一点，R.anim.slide_left_out）;
        slideRightIn = AnimationUtils
                .loadAnimation（这一点，R.anim.slide_right_in）;
        slideRightOut = AnimationUtils.loadAnimation（这一点，
                R.anim.slide_right_out）;

        gestureDetector =新GestureDetector（新MyGestureDetector（））;
        gestureListener =新View.OnTouchListener（）{
            公共布尔onTouch（视图V，MotionEvent事件）{
                如果（gestureDetector.onTouchEvent（事件））{
                    返回true;
                }
                返回false;
            }
        };
        lv.setAdapter（新ArrayAdapter＆LT;字符串＆GT;（这一点，
                android.R.layout.simple_list_item_1，市））;
        lv2.setAdapter（新ArrayAdapter＆LT;字符串＆GT;（这一点，
                android.R.layout.simple_list_item_1，国家））;
        lv.setOnItemClickListener（新OnItemClickListener（）{
            公共无效onItemClick（适配器视图为arg0，视图中查看，INT位置，
                    长ID）{
                //用户点击一个列表项，使其选定
                Toast.makeText（getBaseContext（），项目已点击，
                        Toast.LENGTH_SHORT）.show（）;
                // selectedAdapter.setSelectedPosition（位置）;
            }
        }）;
        lv2.setOnItemClickListener（新OnItemClickListener（）{
            公共无效onItemClick（适配器视图为arg0，视图中查看，INT位置，
                    长ID）{
                //用户点击一个列表项，使其选定
                Toast.makeText（getBaseContext（），项目列表2点击的，
                        Toast.LENGTH_SHORT）.show（）;
                // selectedAdapter.setSelectedPosition（位置）;
            }
        }）;
    }

    类MyGestureDetector扩展SimpleOnGestureListener {
        @覆盖
        公共布尔onFling（MotionEvent E1，E2 MotionEvent，浮velocityX，
                浮动velocityY）{
            尝试 {
                如果（Math.abs（e1.getY（） -  e2.getY（））＆GT; SWIPE_MAX_OFF_PATH）
                    返回false;
                //从右向左轻扫
                如果（e1.getX（） -  e2.getX（）＆GT; SWIPE_MIN_DISTANCE
                        ＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
                    viewFlipper.setInAnimation（slideLeftIn）;
                    viewFlipper.setOutAnimation（slideLeftOut）;
                    viewFlipper.showNext（）;
                }否则，如果（e2.getX（） -  e1.getX（）＆GT; SWIPE_MIN_DISTANCE
                        ＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
                    viewFlipper.setInAnimation（slideRightIn）;
                    viewFlipper.setOutAnimation（slideRightOut）;
                    viewFlipper.show previous（）;
                }
            }赶上（例外五）{
                //什么
            }
            返回false;
        }
    }

    @覆盖
    公共布尔的onTouchEvent（MotionEvent事件）{
        如果（gestureDetector.onTouchEvent（事件））
            返回true;
        其他
            返回false;
    }
}

包括布局（main_layout）用于..... 

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：ID =@ + ID / linearLayout1
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =FILL_PARENT
    机器人：方向=垂直＆GT;

    ＆LT;的LinearLayout
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =WRAP_CONTENT＆GT;

        ＆LT;按钮
            机器人：layout_width =WRAP_CONTENT
            机器人：layout_height =WRAP_CONTENT
            机器人：文本=不要点击只是轻扫上剩余的区域/＆GT;
    ＆LT; / LinearLayout中＆GT;

    ＆LT; ViewFlipper
        的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
        机器人：ID =@ + ID /脚蹼
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =FILL_PARENT＆GT;

        ＆LT;的LinearLayout
            机器人：ID =@ + ID / ViewFlipper01
            机器人：layout_width =FILL_PARENT
            机器人：layout_height =FILL_PARENT
            机器人：方向=垂直＆GT;

            ＆LT;的ListView
                机器人：ID =@ + ID / List01
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =WRAP_CONTENT＆GT;
            ＆LT; / ListView控件＆GT;
        ＆LT; / LinearLayout中＆GT;

I have a ViewFlipper which should react to a fling gesture, but it does not.

Activity

@Override
public void onCreate(Bundle savedInstanceState) {
    ...
    listView = this.getListView();
    detector = new GestureDetector(this, new FlingGestureListener(listView));
    ...
}

FlingGestureListener

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
    int pos = source.pointToPosition(Math.round(e1.getX()), Math.round(e1.getY()));
    View v = source.getChildAt(pos - source.getFirstVisiblePosition());
    System.out.println("fling: x=" + velocityX + " y=" + velocityY);
    try {
        IFlingable flingable = (IFlingable) v;
        if(velocityY > -200 && velocityY < 200) {
            if(velocityX < 0)
                flingable.fling(IFlingable.RIGHT_TO_LEFT);
            else if(velocityX > 0)
                flingable.fling(IFlingable.LEFT_TO_RIGHT);
        }
    } catch(Exception e) {}
    return false;
}

View with ViewFlipper which implements IFlingable

public void fling(int direction) {
    System.out.println("flip: " + direction);
    switch(direction) {
        case IFlingable.LEFT_TO_RIGHT:
            System.out.println("piep");
            GUIHelper.setAnimationSlideLeftToRight(context, switcher);
            switcher.showNext();
            break;
        case IFlingable.RIGHT_TO_LEFT:
            System.out.println("pup");
            GUIHelper.setAnimationSlideRightToLeft(context, switcher);
            switcher.showPrevious();
            break;
    }
}

Layout

<ViewFlipper android:id="@+id/viewSwitcher"
    android:layout_height="wrap_content"
    android:layout_width="match_parent" android:layout_weight="1"     
    android:inAnimation="@anim/slide_in_left" 
    android:outAnimation="@anim/slide_out_right">
        <LinearLayout android:layout_height="wrap_content" 
           android:layout_width="match_parent" android:orientation="vertical">
             ...
        </LinearLayout>
      ...
    </ViewFlipper>

Log

fling: x=2542.3613 y=95.877945
flip: 0
piep

I get the right log messages so the showNext() on the ViewFlipper gets executed but it does not change its view on the gui. Am I missing something? I have another layout with a ViewSwitcher instead of the Flipper and that one works.

EDIT:

Here are the missing classes:

public class GUIHelper {
... 

public static void setAnimationSlideLeftToRight(Context context, ViewAnimator switcher) {
    Animation in = AnimationUtils.loadAnimation(context, R.anim.slide_in_left);
    Animation out = AnimationUtils.loadAnimation(context, R.anim.slide_out_right);
    switcher.setInAnimation(in);
    switcher.setOutAnimation(out);
}

public static void setAnimationSlideRightToLeft(Context context, ViewAnimator switcher) {
    Animation in = AnimationUtils.loadAnimation(context, R.anim.slide_in_right);
    Animation out = AnimationUtils.loadAnimation(context, R.anim.slide_out_left);
    switcher.setInAnimation(in);
    switcher.setOutAnimation(out);
}

...
}

public interface IFlingable {

    public static final int LEFT_TO_RIGHT = 0;
    public static final int RIGHT_TO_LEFT = 1;

    public void fling(int direction, boolean fling);

}

解决方案

Hello this is the running swipe code on listView just as your xml I have placed a ListView with parent LinearLayout in ViewFlipper 

import android.app.Activity;
import android.os.Bundle;

import android.view.GestureDetector;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.MotionEvent;

import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.ViewFlipper;

import android.widget.AdapterView.OnItemClickListener;


public class MainActivity extends Activity {

    private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 250;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;
    private GestureDetector gestureDetector;
    View.OnTouchListener gestureListener;
    private Animation slideLeftIn;
    private Animation slideLeftOut;
    private Animation slideRightIn;
    private Animation slideRightOut;
    private ViewFlipper viewFlipper;
    private ListView lv;
    private String[] city = { "Indore", "Bhopal", "Khargone", "Ujjain",
        "Nasik", "Pune", "Delhi", "Mumbai", "Noida", "Hyderabad",
        "Banglore", "Ajmer", "Goa", "Jaipur", "Nagpur", "" };
    private String[] country = { "India", "Bhutan", "Kuwait", "USA", };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout);
        lv = (ListView) findViewById(R.id.List01);
        ListView lv2 = (ListView) findViewById(R.id.List02);

        viewFlipper = (ViewFlipper) findViewById(R.id.flipper);
        slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in);
        slideLeftOut = AnimationUtils
                .loadAnimation(this, R.anim.slide_left_out);
        slideRightIn = AnimationUtils
                .loadAnimation(this, R.anim.slide_right_in);
        slideRightOut = AnimationUtils.loadAnimation(this,
                R.anim.slide_right_out);

        gestureDetector = new GestureDetector(new MyGestureDetector());
        gestureListener = new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                if (gestureDetector.onTouchEvent(event)) {
                    return true;
                }
                return false;
            }
        };
        lv.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, city));
        lv2.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, country));
        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView arg0, View view, int position,
                    long id) {
                // user clicked a list item, make it "selected"
                Toast.makeText(getBaseContext(), "Item Clicked",
                        Toast.LENGTH_SHORT).show();
                // selectedAdapter.setSelectedPosition(position);
            }
        });
        lv2.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView arg0, View view, int position,
                    long id) {
                // user clicked a list item, make it "selected"
                Toast.makeText(getBaseContext(), "Item List2 Clicked",
                        Toast.LENGTH_SHORT).show();
                // selectedAdapter.setSelectedPosition(position);
            }
        });
    }

    class MyGestureDetector extends SimpleOnGestureListener {
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY) {
            try {
                if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
                    return false;
                // right to left swipe
                if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
                        && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                    viewFlipper.setInAnimation(slideLeftIn);
                    viewFlipper.setOutAnimation(slideLeftOut);
                    viewFlipper.showNext();
                } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
                        && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                    viewFlipper.setInAnimation(slideRightIn);
                    viewFlipper.setOutAnimation(slideRightOut);
                    viewFlipper.showPrevious();
                }
            } catch (Exception e) {
                // nothing
            }
            return false;
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (gestureDetector.onTouchEvent(event))
            return true;
        else
            return false;
    }
}

Included the layout(main_layout) that is used.....

 <?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Do not Click Just swipe on remaining area" />
    </LinearLayout>

    <ViewFlipper
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/flipper"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <LinearLayout
            android:id="@+id/ViewFlipper01"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="vertical" >

            <ListView
                android:id="@+id/List01"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" >
            </ListView>
        </LinearLayout>

这篇关于Android的ViewFlipper不翻转的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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