android webview 文字重叠,android webview 文字复制

将下面的类作为一个工具类，放到项目中，

package local.nt.phone.activity;

import java.lang.reflect.Method;

import android.app.Activity;

import android.os.Build;

import android.util.Log;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.KeyEvent;

import android.view.Menu;

import android.view.MenuItem;

import android.view.MenuItem.OnMenuItemClickListener;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.view.ViewConfiguration;

import android.webkit.WebView;

public class WebViewCopy {

private Activity activity;

private WebView webview;

private static boolean mIsSelectingText;

public static final String TAG=WebViewCopy.class.getSimpleName();

public WebViewCopy(final Activity activity, final WebView webView){

this.webview=webView;

this.activity=activity;

this.activity.registerForContextMenu(this.webview);

webView.requestFocus(View.FOCUS_DOWN);

webView.setOnTouchListener(new OnTouchListener() {

boolean mHasPerformedLongPress;

Runnable mPendingCheckForLongPress;

@Override

public boolean onTouch(final View v, MotionEvent event) {

/* webView.getSettings().setBuiltInZoomControls(false);

webView.getSettings().setSupportZoom(false);*/

Log.d(TAG, "event:" + event.getAction());

switch (event.getAction()) {

case MotionEvent.ACTION_UP:

mIsSelectingText = false;

if (!v.hasFocus()) {

v.requestFocus();

}

if (!mHasPerformedLongPress) {

// This is a tap, so remove the longpress check

if (mPendingCheckForLongPress != null) {

v.removeCallbacks(mPendingCheckForLongPress);

}

// v.performClick();

}

break;

case MotionEvent.ACTION_DOWN:

if (!v.hasFocus()) {

v.requestFocus();

}

if( mPendingCheckForLongPress == null) {

mPendingCheckForLongPress = new Runnable() {

public void run() {

//((WebView)v).performLongClick();

if(! mIsSelectingText) {

activity.openContextMenu(webview);

mHasPerformedLongPress = true;

mIsSelectingText = false;

}

}

};

}

mHasPerformedLongPress = false;

v. postDelayed(mPendingCheckForLongPress, ViewConfiguration.getLongPressTimeout());

break;

case MotionEvent.ACTION_MOVE:

final int x = (int) event.getX();

final int y = (int) event.getY();

// Be lenient about moving outside of buttons

int slop = ViewConfiguration.get(v.getContext()).getScaledTouchSlop();

if ((x < 0 - slop) || (x >= v.getWidth() + slop) ||

(y < 0 - slop) || (y >= v.getHeight() + slop)) {

if (mPendingCheckForLongPress != null) {

v. removeCallbacks(mPendingCheckForLongPress);

}

}

break;

default:

return false;

}

return false;

}

});

}

public static synchronized void emulateShiftHeld(WebView view)

{

try

{

KeyEvent shiftPressEvent = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN,

KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0);

shiftPressEvent.dispatch(view);

}

catch (Exception e)

{

Log.e(TAG, "Exception in emulateShiftHeld()", e);

}

}

public synchronized void onCreateContextMenu(ContextMenu menu, View v,

ContextMenuInfo menuInfo,final int copy,String menuString) {

MenuItem menuitem=menu.add(1, copy, Menu.NONE, menuString);

menuitem.setOnMenuItemClickListener(new OnMenuItemClickListener() {

@Override

public boolean onMenuItemClick(MenuItem item) {

if(item.getItemId()==copy){

//emulateShiftHeld(webview);

selectAndCopyText(webview);

}

return false;

}

});

}

public static synchronized void selectAndCopyText(WebView v) {

try {

mIsSelectingText = true;

//Method m = WebView.class.getMethod("emulateShiftHeld", Boolean.TYPE);

// m.invoke(v, false);

if (android.os.Build.VERSION.SDK_INT <= Build.VERSION_CODES.ECLAIR) {

Method m = WebView.class.getMethod("emulateShiftHeld", Boolean.TYPE);

m.invoke(v, false);

}

else {

Method m = WebView.class.getMethod("emulateShiftHeld");

m.invoke(v);

}

} catch (Exception e) {

// fallback

emulateShiftHeld(v);

}finally{

//Toast.makeText(activity, "Select text", Toast.LENGTH_SHORT).show();

}

}

}

之后在要用到的activity中，：myWebView = (WebView) findViewById(R.id.mainwebview);实例化webview,

copy = new WebViewCopy(this, myWebView);实例化工具类

再之后，重写onCreateContextMenu，如下

@Override

public void onCreateContextMenu(ContextMenu menu, View v,

ContextMenuInfo menuInfo) {

// TODO Auto-generated method stub

copy.onCreateContextMenu(menu, v, menuInfo,0,"复制");

super.onCreateContextMenu(menu, v, menuInfo);

}

这样在项目的相应的webview中就可以长按，出现复制文字的功能了