1
我想知道當用戶在手機上向左或向右滑動時需要處理的事件。如何處理左滑動和右滑動事件
例如：在用戶在名稱上滑動時在電話日誌或聯繫人中，它開始調用該聯繫人，並在幻燈片右側消息應用程序打開時。
我想知道如何做到這一點，一段代碼片段會更好。
謝謝
A
回答
5
您可以使用此監聽器，你的代碼添加到onSwipeLeft()和onSwipeRight()：
public class OnSwipeTouchListener implements OnTouchListener {
@SuppressWarnings("deprecation")
private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());
public boolean onTouch(final View v, final MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
onTouch(e);
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
} else {
// onTouch(e);
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
0
-1
ü需要使用GestureDetector和SimpleOnGestureListener。以下是在特定視圖上使用滑動的代碼。這一個對的FrameLayout：
package com.ex.gessture;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
public class GestureListenerActivity extends Activity {
FrameLayout frame;
GestureDetector mGestureDetector;
String TAG = "GestureListenerActivity";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
frame = (FrameLayout) findViewById(R.id.frame);
mGestureDetector = new GestureDetector(this, mGestureListener);
frame.setOnTouchListener(new FrameLayout.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return mGestureDetector.onTouchEvent(event);
}
});
}
/**
* Gesture Event Handler
*/
private SimpleOnGestureListener mGestureListener = new SimpleOnGestureListener() {
int swipe_Min_Distance = 100;
int swipe_Max_Distance = 350;
int swipe_Min_Velocity = 100;
/*
@Override
public boolean onDown(MotionEvent e) {
Log.i(TAG, "[CALLBACK_GL] boolean onDown(e:" + e + ")");
return super.onDown(e);
}
*/
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onSingleTapUp(MotionEvent e)
{
/**
*
* Do your stuff
*
*/
return super.onSingleTapUp(e);
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
Log.i(TAG, "[CALLBACK_GL] boolean onSingleTapConfirmed(e:" + e + ")");
return super.onSingleTapConfirmed(e);
}
@Override
public boolean onDoubleTap(MotionEvent e) {
Log.i(TAG, "[CALLBACK_GL] boolean onDoubleTap(e:" + e + ")");
return super.onDoubleTap(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Log.i(TAG, "[CALLBACK_GL] boolean onFling(e1:" + e1 + ", e2:" + e2 + ", velocityX:" + velocityX
+ ", velocityY:" + velocityY + "");
final float xDistance = Math.abs(e1.getX() - e2.getX());
final float yDistance = Math.abs(e1.getY() - e2.getY());
if(xDistance > this.swipe_Max_Distance || yDistance > this.swipe_Max_Distance)
return false;
velocityX = Math.abs(velocityX);
velocityY = Math.abs(velocityY);
boolean result = false;
if(velocityX > this.swipe_Min_Velocity && xDistance > this.swipe_Min_Distance){
if(e1.getX() > e2.getX()) // right to left
//this.listener.onSwipe(SWIPE_LEFT);
Log.i(TAG, "Swipe Left");
else
Log.i(TAG, "Swipe Right");
//this.listener.onSwipe(SWIPE_RIGHT);
}
//return super.onFling(e1, e2, velocityX, velocityY);
return true;
}
@Override
public void onShowPress(MotionEvent e) {
Log.i(TAG, "[CALLBACK_GL] void onShowPress(e:" + e + ")");
super.onShowPress(e);
}
@Override
public void onLongPress(MotionEvent e) {
Log.i(TAG, "[CALLBACK_GL] void onLongPress(e:" + e + ")");
super.onLongPress(e);
}
};
}
的main.xml：
<?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" android:weightSum="1">
<FrameLayout
android:id="@+id/frame"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:background="#ffffff"
android:layout_margin="50dp">
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" android:layout_gravity="center"/>
</FrameLayout>
下面是使用獨立的類，並在整個屏幕上使用運動事件不同的方法鏈接，而不僅僅是特定的視圖： http://misha.beshkin.lv/android-swipe-gesture-implementation/。此鏈接將解決您的所有問題！
4
OnSwipeTouchListener.java：
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
public OnSwipeTouchListener (Context ctx){
gestureDetector = new GestureDetector(ctx, new GestureListener());
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
result = true;
}
else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
result = true;
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
用法：
imageView.setOnTouchListener(new OnSwipeTouchListener() {
public void onSwipeTop() {
Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();
}
public void onSwipeLeft() {
Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
}
public void onSwipeBottom() {
Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
}
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
});
+1
酷:)工作就像一個魅力:) –
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但我怎麼能使用它。請給我一個例子。例如，我不知道如何將它放在我的MainActivity中，以及如何將該事件放在名稱中，我需要處理此事件。 –