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