Question

Android中有类似onLeftSwipeListener和onRightSwipeListener的内容吗？我想切换视图向前和向后滑动手指。我在里面使用了FrameLayout和一个ImageView。

Answer 1

名为GestureDetector和SimpleOnGestureListener的onFling()。在这种情况下它被称为投掷而不是刷卡：）

Answer 2

yourView.setOnTouchListner(onThumbTouch );

    OnTouchListener onThumbTouch = new OnTouchListener() {
            float previouspoint = 0 ;
            float startPoint=0;
            @Override
            public boolean onTouch(View v, MotionEvent event) {   
                switch(v.getId()) {
                    case R.id.tvDetailsalaujairiyat: // Give your R.id.sample ...
                        switch(event.getAction()){
                            case MotionEvent.ACTION_DOWN:
                                startPoint=event.getX();
                                System.out.println("Action down,..."+event.getX());
                            break;
                            case MotionEvent.ACTION_MOVE:

                            break;
                            case MotionEvent.ACTION_CANCEL:
                                previouspoint=event.getX();
                                if(previouspoint > startPoint){
                                   //Right side swipe        
                                }else{
                                   // Left side swipe
                                }        
                            break;
                       }
                    break;
                }
                return true;
            }
        };

Answer 3

我在android中做了一个swiper的小例子我希望与你分享代码。

谢谢。

// LAYOUT ///

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

    <ViewFlipper
        android:id="@+id/view_flipper"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center_vertical" >

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Soy A"
            android:textColor="#FFFFFF" />

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Soy B"
            android:textColor="#BBBFFF" />

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Soy C"
            android:textColor="#FFBBFF" />

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Soy D"
            android:textColor="#FFFFAF" />
    </ViewFlipper>

</LinearLayout>

/// ACTIVITY ///

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.View.OnTouchListener;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ViewFlipper;

public class SwipeActivity extends Activity {

    private Animation mInFromRight;
    private Animation mOutToLeft;
    private Animation mInFromLeft;
    private Animation mOutToRight;
    private ViewFlipper mViewFlipper;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mViewFlipper = (ViewFlipper) findViewById(R.id.view_flipper);
        mViewFlipper.setDisplayedChild(0);
        initAnimations();
    }

    private void initAnimations() {
        mInFromRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT,
                +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        mInFromRight.setDuration(500);
        AccelerateInterpolator accelerateInterpolator = new AccelerateInterpolator();
        mInFromRight.setInterpolator(accelerateInterpolator);

        mInFromLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT,
                -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        mInFromLeft.setDuration(500);
        mInFromLeft.setInterpolator(accelerateInterpolator);

        mOutToRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT,
                0.0f, Animation.RELATIVE_TO_PARENT, +1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        mOutToRight.setDuration(500);
        mOutToRight.setInterpolator(accelerateInterpolator);

        mOutToLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, -1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        mOutToLeft.setDuration(500);
        mOutToLeft.setInterpolator(accelerateInterpolator);

        final GestureDetector gestureDetector;
        gestureDetector = new GestureDetector(new MyGestureDetector());

        mViewFlipper.setOnTouchListener(new OnTouchListener() {

            public boolean onTouch(View v, MotionEvent event) {
                if (gestureDetector.onTouchEvent(event)) {
                    return false;
                } else {
                    return true;
                }
            }
        });
    }

    private class MyGestureDetector extends SimpleOnGestureListener {

        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;

        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY) {
            System.out.println(" in onFling() :: ");
            if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
                return false;
            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                mViewFlipper.setInAnimation(mInFromRight);
                mViewFlipper.setOutAnimation(mOutToLeft);
                mViewFlipper.showNext();
            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                mViewFlipper.setInAnimation(mInFromLeft);
                mViewFlipper.setOutAnimation(mOutToRight);
                mViewFlipper.showPrevious();
            }
            return super.onFling(e1, e2, velocityX, velocityY);
        }
    }
}

Answer 4

这是关于实施手势检测的相关问题：

Fling gesture detection on grid layout

您还可以使用带有动画的ViewFlipper在视图之间切换，看起来不错，这是在viewflipper上启用左/右滑动的示例实现：

http://www.inter-fuser.com/2009/07/android-transistions-slide-in-and-slide.html

在Android中滑动侦听器

4 个答案: