Android在web view中监听屏幕双击的两种方式onClick与onTouch

来源：互联网发布：安卓扒谱软件编辑：程序博客网时间：2024/06/14 03:37

1.onclick方法
缺点：不能在web view打开的网页中监听

//MainActivity.java页面package com.example.aaa;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.ViewGroup;import com.example.aaa.MainActivity;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.TextView;import android.widget.Toast;import android.view.LayoutInflater;import android.widget.LinearLayout;public class MainActivity extends ActionBarActivity {   private boolean waitDouble = true;   private static final int DOUBLE_CLICK_TIME = 350;   @Override   public void onCreate(Bundle savedInstanceState){      super.onCreate(savedInstanceState);      this.setContentView(R.layout.activity_main);      //TextView hello = (TextView)findViewById(R.id.q);      LayoutInflater inflater = LayoutInflater.from(MainActivity.this);      LinearLayout hello = (LinearLayout)findViewById(R.id.q);      //LinearLayout hello = (LinearLayout)findViewById(R.id.q);      hello.setOnClickListener(listener);   }   OnClickListener listener = new OnClickListener(){      @Override      public void onClick(View v) {         // TODO Auto-generated method stub         if(waitDouble == true){            waitDouble = false;            Thread thread = new Thread(){               @Override               public void run(){                  try {                     sleep(DOUBLE_CLICK_TIME);                     if(waitDouble == false){                        waitDouble = true;                        singleClick();                     }                  } catch (InterruptedException e) {                     // TODO Auto-generated catch block                     e.printStackTrace();                  }               }            };            thread.start();         }else{            waitDouble = true;            doubleClick();         }      }   };   private void singleClick(){      System.out.println("single");   }   private void doubleClick(){       Toast.mak``Text(MainActivity.this, "双击", Toast.LENGTH_LONG)       .show();   }}

//activity_main.xml页面<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/q"    android:descendantFocusability="blocksDescendants"    android:orientation="vertical" >    <TextView        android:id="@+id/c"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="hello" /></LinearLayout>

源码下载：http://download.csdn.net/download/qq_25252769/9958627

2.onTouch方法
可以在web view打开的页面使用双击事件

//MainActivity.java页面package com.example.full;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import com.example.full.R;import com.example.full.MainActivity;import android.app.Activity;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.widget.TextView;import android.widget.Toast;import android.view.LayoutInflater;import android.widget.LinearLayout;         import android.app.ActivityManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.view.KeyEvent;import android.webkit.WebView;import android.webkit.WebViewClient;import android.view.Window;import android.view.MotionEvent;public class MainActivity extends ActionBarActivity{     private boolean waitDouble = true;    private static final int DOUBLE_CLICK_TIME = 350;    private final int DOUBLE_TAP_TIMEOUT = 200;      private MotionEvent mCurrentDownEvent;      private MotionEvent mPreviousUpEvent;    public void onCreate(Bundle savedInstanceState){         requestWindowFeature(Window.FEATURE_NO_TITLE);         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);       //外部网页        init();        //TextView hello = (TextView)findViewById(R.id.q);        //LayoutInflater inflater = LayoutInflater.from(MainActivity.this);        //LinearLayout hello = (LinearLayout)findViewById(R.id.q);        //LinearLayout hello = (LinearLayout)findViewById(R.id.q);        //WebView hello = (WebView)findViewById(R.id.webView);        webView = (WebView) findViewById(R.id.webView);        webView.setOnTouchListener(listener);      }     OnTouchListener listener = new OnTouchListener(){        @Override        public boolean onTouch(View v,MotionEvent event) {           // TODO Auto-generated method stub           /*if(waitDouble == true){              waitDouble = false;              Thread thread = new Thread(){                 @Override                 public void run(){                    try {                       sleep(DOUBLE_CLICK_TIME);                       if(waitDouble == false){                          waitDouble = true;                          singleClick();                       }                    } catch (InterruptedException e) {                       // TODO Auto-generated catch block                       e.printStackTrace();                    }                 }              };              thread.start();           }else{              waitDouble = true;              doubleClick();           }*/            if (event.getAction() == MotionEvent.ACTION_DOWN) {                              if (mPreviousUpEvent != null                                      && mCurrentDownEvent != null                                      && isConsideredDoubleTap(mCurrentDownEvent,                                              mPreviousUpEvent, event)) {                                  Toast.makeText(MainActivity.this, "双击", Toast.LENGTH_LONG).show();                              }                              mCurrentDownEvent = MotionEvent.obtain(event);                          } else if (event.getAction() == MotionEvent.ACTION_UP) {                              mPreviousUpEvent = MotionEvent.obtain(event);                          }           return false;        }     };     private boolean isConsideredDoubleTap(MotionEvent firstDown,                       MotionEvent firstUp, MotionEvent secondDown) {                   if (secondDown.getEventTime() - firstUp.getEventTime() > DOUBLE_TAP_TIMEOUT) {                       return false;                   }                   int deltaX = (int) firstUp.getX() - (int) secondDown.getX();                   int deltaY = (int) firstUp.getY() - (int) secondDown.getY();                   return deltaX * deltaX + deltaY * deltaY < 10000;               }       private void singleClick(){         Toast.makeText(MainActivity.this, "单击", Toast.LENGTH_LONG)         .show();     }     private void doubleClick(){       Toast.makeText(MainActivity.this, "双击", Toast.LENGTH_LONG).show();     } private WebView webView;    private void init(){        webView = (WebView) findViewById(R.id.webView);        webView.getSettings().setBuiltInZoomControls(true);        //WebView加载web资源       webView.loadUrl("http://baidu.com");        //覆盖WebView默认使用第三方或系统默认浏览器打开网页的行为，使网页用WebView打开       webView.setWebViewClient(new WebViewClient(){           @Override        public boolean shouldOverrideUrlLoading(WebView view, String url) {            // TODO Auto-generated method stub               //返`值是true的时候控制去WebView打开，为false调用系统浏览器或第三方浏览器             view.loadUrl(url);            return true;        }       });    }}

//activity_main.xml页面<?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:fadingEdgeLength="0sp"     android:id="@+id/q"    >    <LinearLayout        android:id="@+id/myTitleBarLayout"          android:layout_width="fill_parent"          android:layout_height="wrap_content"         android:orientation="vertical"         >         <TextView             android:id="@+id/myTitleBarTextView"             android:layout_width="fill_parent"              android:layout_height="wrap_content"             android:text="@string/app_name"             android:paddingTop="4dip"             android:paddingBottom="4dip"             android:paddingLeft="6dip"             android:textStyle="bold"             android:shadowColor="#BB000000"             android:shadowRadius="3.0"             android:shadowDy=".25"         />         <View             android:layout_width="fill_parent"             android:layout_height="1dip"             android:background="#CCEEEEEE"             android:padding="10dip"         />     </LinearLayout>     <!-- <ScrollView         android:layout_width="fill_parent"          android:layout_height="fill_parent"         android:layout_weight="1"         >         Insert your regular layout stuff here         <Button android:id="@+id/toggle_title_button"              android:layout_width="wrap_content"              android:layout_height="wrap_content"             android:text="Toggle Title"          />     </ScrollView> -->      <WebView     android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/webView"    /></LinearLayout>

源码下载：http://download.csdn.net/download/qq_25252769/9958637

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