在发布此问题之前，我已经搜索了很多但是在这个问题上找不到任何明确的答案。
我必须覆盖android webview＆amp;的默认文本选择。显示我的自定义文本选择对话框选项我试过这个示例代码project。
此示例项目适用于以下设备＆amp;模拟器：
不支持以下设备：
在Android操作系统版本4.1＆amp; 4.1+而不是显示我的自定义文本选择选项对话框，它显示了android系统的文本选择默认操作栏。
我对此进行了大量搜索，很多人建议使用interface
的 onLongClick（）方法我已经在这个论坛上问了一个问题，请看这个link，这个问题的答案我可以克隆onLongClick（）事件，但我无法停止默认文本选择操作栏。
对于这种情况，我几乎没有问题。
1.为什么onLongClick（）方法停止在android os 4.1+上运行的设备工作？
2.如果长按webview中的文本，如何停止默认文本选择操作栏？
这是我自定义的webview类。
package com.epubreader.ebook;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.graphics.Region;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Display;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.webkit.WebView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.epubreader.R;
import com.epubreader.drag.DragController;
import com.epubreader.drag.DragLayer;
import com.epubreader.drag.DragListener;
import com.epubreader.drag.DragSource;
import com.epubreader.drag.MyAbsoluteLayout;
import com.epubreader.menu.menuAnimationHelper;
import com.epubreader.textselection.WebTextSelectionJSInterface;
import com.epubreader.textselectionoverlay.ActionItem;
import com.epubreader.textselectionoverlay.QuickAction;
import com.epubreader.textselectionoverlay.QuickAction.OnDismissListener;
public class CustomWebView extends WebView implements WebTextSelectionJSInterface,
OnTouchListener , OnLongClickListener, OnDismissListener, DragListener{
/** The logging tag. */
private static final String TAG = "CustomWebView";
/** Context. */
protected Context ctx;
/** The context menu. */
private QuickAction mContextMenu;
/** The drag layer for selection. */
private DragLayer mSelectionDragLayer;
/** The drag controller for selection. */
private DragController mDragController;
/** The start selection handle. */
private ImageView mStartSelectionHandle;
/** the end selection handle. */
private ImageView mEndSelectionHandle;
/** The selection bounds. */
private Rect mSelectionBounds = null;
/** The previously selected region. */
protected Region lastSelectedRegion = null;
/** The selected range. */
protected String selectedRange = "";
/** The selected text. */
protected String selectedText = "";
/** Javascript interface for catching text selection. */
/** Selection mode flag. */
protected boolean inSelectionMode = false;
/** Flag to stop from showing context menu twice. */
protected boolean contextMenuVisible = false;
/** The current content width. */
protected int contentWidth = 0;
/** Identifier for the selection start handle. */
private final int SELECTION_START_HANDLE = 0;
/** Identifier for the selection end handle. */
private final int SELECTION_END_HANDLE = 1;
/** Last touched selection handle. */
private int mLastTouchedSelectionHandle = -1;
/** Variables for Left & Right Menu ***/
private View menuView;
private LinearLayout toiLay;
private menuAnimationHelper _menuAnimationHelper;
private TocTranslateAnimation _tocTranslateAnimation;
private CustomWebView _customWebView;
public CustomWebView(Context context) {
super(context);
this.ctx = context;
this.setup(context);
}
public CustomWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.ctx = context;
this.setup(context);
}
public CustomWebView(Context context, AttributeSet attrs) {
super(context, attrs);
this.ctx = context;
this.setup(context);
}
//*****************************************************
//*
//* Touch Listeners
//*
//*****************************************************
private boolean mScrolling = false;
private float mScrollDiffY = 0;
private float mLastTouchY = 0;
private float mScrollDiffX = 0;
private float mLastTouchX = 0;
@Override
public boolean onTouch(View v, MotionEvent event) {
float xPoint = getDensityIndependentValue(event.getX(), ctx) / getDensityIndependentValue(this.getScale(), ctx);
float yPoint = getDensityIndependentValue(event.getY(), ctx) / getDensityIndependentValue(this.getScale(), ctx);
// TODO: Need to update this to use this.getScale() as a factor.
//Log.d(TAG, "onTouch " + xPoint + " , " + yPoint);
closeMenu();
if(event.getAction() == MotionEvent.ACTION_DOWN){
final String startTouchUrl = String.format("javascript:android.selection.startTouch(%f, %f);",
xPoint, yPoint);
mLastTouchX = xPoint;
mLastTouchY = yPoint;
((Activity)this.ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl(startTouchUrl);
}
});
// This two line clones the onLongClick()
longClickHandler.removeCallbacks(longClickRunnable);
longClickHandler.postDelayed(longClickRunnable,300);
}
else if(event.getAction() == MotionEvent.ACTION_UP){
// Check for scrolling flag
if(!mScrolling){
this.endSelectionMode();
}
// This line clones the onLongClick()
longClickHandler.removeCallbacks(longClickRunnable);
mScrollDiffX = 0;
mScrollDiffY = 0;
mScrolling = false;
}else if(event.getAction() == MotionEvent.ACTION_MOVE){
mScrollDiffX += (xPoint - mLastTouchX);
mScrollDiffY += (yPoint - mLastTouchY);
mLastTouchX = xPoint;
mLastTouchY = yPoint;
// Only account for legitimate movement.
if(Math.abs(mScrollDiffX) > 10 || Math.abs(mScrollDiffY) > 10){
mScrolling = true;
}
// This line clones the onLongClick()
longClickHandler.removeCallbacks(longClickRunnable);
}
// If this is in selection mode, then nothing else should handle this touch
return false;
}
/**
* Pass References of Left & Right Menu
*/
public void initMenu(LinearLayout _toiLay,View _menuView,menuAnimationHelper menuAnimationHelper,
TocTranslateAnimation tocTranslateAnimation){
toiLay = _toiLay;
menuView = _menuView;
_menuAnimationHelper = menuAnimationHelper;
_tocTranslateAnimation = tocTranslateAnimation;
}
private void closeMenu(){
if(_menuAnimationHelper != null && _menuAnimationHelper.isMenuOpenBool){
_menuAnimationHelper.close(menuView);
_menuAnimationHelper.isMenuOpenBool = false;
}
if(_tocTranslateAnimation != null && _tocTranslateAnimation.isTocListOpenBool){
_tocTranslateAnimation.close(toiLay);
_tocTranslateAnimation.isTocListOpenBool = false;
}
}
public void removeOverlay(){
Log.d("JsHandler", "in java removeOverlay" + mScrolling);
this.endSelectionMode();
mScrollDiffX = 0;
mScrollDiffY = 0;
mScrolling = false;
}
@Override
public boolean onLongClick(View v){
Log.d(TAG, "from webView onLongClick ");
mScrolling = true;
((Activity)this.ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl("javascript:android.selection.longTouch()");
}
});
Toast.makeText(ctx, "Long click is clicked ", Toast.LENGTH_LONG).show();
// Don't let the webview handle it
return true;
}
//*****************************************************
//*
//* Setup
//*
//*****************************************************
ContextMenu.ContextMenuInfo contextMenuInfo;
/**
* Setups up the web view.
* @param context
*/
protected void setup(Context context){
// On Touch Listener
this.setOnTouchListener(this);
this.setClickable(false);
this.setLongClickable(true);
this.setOnLongClickListener(this);
contextMenuInfo = this.getContextMenuInfo();
// Webview setup
this.getSettings().setJavaScriptEnabled(true);
this.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
// Create the selection handles
createSelectionLayer(context);
// Set to the empty region
Region region = new Region();
region.setEmpty();
_customWebView = this;
this.lastSelectedRegion = region;
}
/**
* To clone OnLongClick Listener because its not responding for version 4.1
*/
public Runnable longClickRunnable = new Runnable() {
public void run() {
longClickHandler.sendEmptyMessage(0);
}
};
public Handler longClickHandler = new Handler(){
public void handleMessage(Message m){
_customWebView.loadUrl("javascript:android.selection.longTouch();");
mScrolling = true;
}
};
public WebTextSelectionJSInterface getTextSelectionJsInterface(){
return this;
}
//*****************************************************
//*
//* Selection Layer Handling
//*
//*****************************************************
/**
* Creates the selection layer.
*
* @param context
*/
protected void createSelectionLayer(Context context){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.mSelectionDragLayer = (DragLayer) inflater.inflate(R.layout.selection_drag_layer, null);
// Make sure it's filling parent
this.mDragController = new DragController(context);
this.mDragController.setDragListener(this);
this.mDragController.addDropTarget(mSelectionDragLayer);
this.mSelectionDragLayer.setDragController(mDragController);
this.mStartSelectionHandle = (ImageView) this.mSelectionDragLayer.findViewById(R.id.startHandle);
this.mStartSelectionHandle.setTag(new Integer(SELECTION_START_HANDLE));
this.mEndSelectionHandle = (ImageView) this.mSelectionDragLayer.findViewById(R.id.endHandle);
this.mEndSelectionHandle.setTag(new Integer(SELECTION_END_HANDLE));
OnTouchListener handleTouchListener = new OnTouchListener(){
@Override
public boolean onTouch(View v, MotionEvent event) {
boolean handledHere = false;
final int action = event.getAction();
// Down event starts drag for handle.
if (action == MotionEvent.ACTION_DOWN) {
handledHere = startDrag (v);
mLastTouchedSelectionHandle = (Integer) v.getTag();
}
return handledHere;
}
};
this.mStartSelectionHandle.setOnTouchListener(handleTouchListener);
this.mEndSelectionHandle.setOnTouchListener(handleTouchListener);
}
/**
* Starts selection mode on the UI thread
*/
private Handler startSelectionModeHandler = new Handler(){
public void handleMessage(Message m){
if(mSelectionBounds == null)
return;
addView(mSelectionDragLayer);
drawSelectionHandles();
int contentHeight = (int) Math.ceil(getDensityDependentValue(getContentHeight(), ctx));
// Update Layout Params
ViewGroup.LayoutParams layerParams = mSelectionDragLayer.getLayoutParams();
layerParams.height = contentHeight;
layerParams.width = contentWidth;
mSelectionDragLayer.setLayoutParams(layerParams);
}
};
/**
* Starts selection mode.
*
* @param selectionBounds
*/
public void startSelectionMode(){
this.startSelectionModeHandler.sendEmptyMessage(0);
}
// Ends selection mode on the UI thread
private Handler endSelectionModeHandler = new Handler(){
public void handleMessage(Message m){
//Log.d("TableContentsWithDisplay", "in endSelectionModeHandler");
removeView(mSelectionDragLayer);
if(getParent() != null && mContextMenu != null && contextMenuVisible){
// This will throw an error if the webview is being redrawn.
// No error handling needed, just need to stop the crash.
try{
mContextMenu.dismiss();
}
catch(Exception e){
}
}
mSelectionBounds = null;
mLastTouchedSelectionHandle = -1;
try {
((Activity)ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl("javascript: android.selection.clearSelection();");
}
});
} catch (Exception e) {
// TODO: handle exception
}
}
};
/**
* Ends selection mode.
*/
public void endSelectionMode(){
this.endSelectionModeHandler.sendEmptyMessage(0);
}
/**
* Calls the handler for drawing the selection handles.
*/
private void drawSelectionHandles(){
this.drawSelectionHandlesHandler.sendEmptyMessage(0);
}
/**
* Handler for drawing the selection handles on the UI thread.
*/
private Handler drawSelectionHandlesHandler = new Handler(){
public void handleMessage(Message m){
MyAbsoluteLayout.LayoutParams startParams = (com.epubreader.drag.MyAbsoluteLayout.LayoutParams) mStartSelectionHandle.getLayoutParams();
startParams.x = (int) (mSelectionBounds.left - mStartSelectionHandle.getDrawable().getIntrinsicWidth());
startParams.y = (int) (mSelectionBounds.top - mStartSelectionHandle.getDrawable().getIntrinsicHeight());
// Stay on screen.
startParams.x = (startParams.x < 0) ? 0 : startParams.x;
startParams.y = (startParams.y < 0) ? 0 : startParams.y;
mStartSelectionHandle.setLayoutParams(startParams);
MyAbsoluteLayout.LayoutParams endParams = (com.epubreader.drag.MyAbsoluteLayout.LayoutParams) mEndSelectionHandle.getLayoutParams();
endParams.x = (int) mSelectionBounds.right;
endParams.y = (int) mSelectionBounds.bottom;
endParams.x = (endParams.x < 0) ? 0 : endParams.x;
endParams.y = (endParams.y < 0) ? 0 : endParams.y;
mEndSelectionHandle.setLayoutParams(endParams);
}
};
/**
* Checks to see if this view is in selection mode.
* @return
*/
public boolean isInSelectionMode(){
return this.mSelectionDragLayer.getParent() != null;
}
//*****************************************************
//*
//* DragListener Methods
//*
//*****************************************************
/**
* Start dragging a view.
*
*/
private boolean startDrag (View v)
{
// Let the DragController initiate a drag-drop sequence.
// I use the dragInfo to pass along the object being dragged.
// I'm not sure how the Launcher designers do this.
Object dragInfo = v;
mDragController.startDrag (v, mSelectionDragLayer, dragInfo, DragController.DRAG_ACTION_MOVE);
return true;
}
@Override
public void onDragStart(DragSource source, Object info, int dragAction) {
// TODO Auto-generated method stub
}
@Override@SuppressWarnings("deprecation")
public void onDragEnd() {
// TODO Auto-generated method stub
MyAbsoluteLayout.LayoutParams startHandleParams = (MyAbsoluteLayout.LayoutParams) this.mStartSelectionHandle.getLayoutParams();
MyAbsoluteLayout.LayoutParams endHandleParams = (MyAbsoluteLayout.LayoutParams) this.mEndSelectionHandle.getLayoutParams();
float scale = getDensityIndependentValue(this.getScale(), ctx);
float startX = startHandleParams.x - this.getScrollX();
float startY = startHandleParams.y - this.getScrollY();
float endX = endHandleParams.x - this.getScrollX();
float endY = endHandleParams.y - this.getScrollY();
startX = getDensityIndependentValue(startX, ctx) / scale;
startY = getDensityIndependentValue(startY, ctx) / scale;
endX = getDensityIndependentValue(endX, ctx) / scale;
endY = getDensityIndependentValue(endY, ctx) / scale;
if(mLastTouchedSelectionHandle == SELECTION_START_HANDLE && startX > 0 && startY > 0){
final String saveStartString = String.format("javascript: android.selection.setStartPos(%f, %f);", startX, startY);
((Activity)ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl(saveStartString);
}
});
}
if(mLastTouchedSelectionHandle == SELECTION_END_HANDLE && endX > 0 && endY > 0){
final String saveEndString = String.format("javascript: android.selection.setEndPos(%f, %f);", endX, endY);
((Activity)ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl(saveEndString);
}
});
}
}
//*****************************************************
//*
//* Context Menu Creation
//*
//*****************************************************
/**
* Shows the context menu using the given region as an anchor point.
* @param region
*/
private void showContextMenu(Rect displayRect){
// Don't show this twice
if(this.contextMenuVisible){
return;
}
// Don't use empty rect
//if(displayRect.isEmpty()){
if(displayRect.right <= displayRect.left){
return;
}
//Copy action item
ActionItem buttonOne = new ActionItem();
buttonOne.setTitle("HighLight");
buttonOne.setActionId(1);
//buttonOne.setIcon(getResources().getDrawable(R.drawable.menu_search));
//Highlight action item
ActionItem buttonTwo = new ActionItem();
buttonTwo.setTitle("Note");
buttonTwo.setActionId(2);
//buttonTwo.setIcon(getResources().getDrawable(R.drawable.menu_info));
ActionItem buttonThree = new ActionItem();
buttonThree.setTitle("Help");
buttonThree.setActionId(3);
//buttonThree.setIcon(getResources().getDrawable(R.drawable.menu_eraser));
// The action menu
mContextMenu = new QuickAction(this.getContext());
mContextMenu.setOnDismissListener(this);
// Add buttons
mContextMenu.addActionItem(buttonOne);
mContextMenu.addActionItem(buttonTwo);
mContextMenu.addActionItem(buttonThree);
//setup the action item click listener
mContextMenu.setOnActionItemClickListener(new QuickAction.OnActionItemClickListener() {
@Override
public void onItemClick(QuickAction source, int pos,
int actionId) {
if (actionId == 1) {
callHighLight();
}
else if (actionId == 2) {
callNote();
}
else if (actionId == 3) {
// Do Button 3 stuff
Log.i(TAG, "Hit Button 3");
}
contextMenuVisible = false;
}
});
this.contextMenuVisible = true;
mContextMenu.show(this, displayRect);
}
private void callHighLight(){
((Activity)this.ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl("javascript:init_txt_selection_event()");
loadUrl("javascript:highlightme_("+0+")");
}
});
}
private void callNote(){
((Activity)this.ctx).runOnUiThread(new Runnable() {
@Override
public void run() {
loadUrl("javascript:init_txt_selection_event()");
loadUrl("javascript:fnGetUserAddedNote('1')");
}
});
}
//*****************************************************
//*
//* OnDismiss Listener
//*
//*****************************************************
/**
* Clears the selection when the context menu is dismissed.
*/
public void onDismiss(){
//clearSelection();
this.contextMenuVisible = false;
}
//*****************************************************
//*
//* Text Selection Javascript Interface Listener
//*
//*****************************************************
/**
* The user has started dragging the selection handles.
*/
public void tsjiStartSelectionMode(){
this.startSelectionMode();
}
/**
* The user has stopped dragging the selection handles.
*/
public void tsjiEndSelectionMode(){
this.endSelectionMode();
}
/**
* The selection has changed
* @param range
* @param text
* @param handleBounds
* @param menuBounds
* @param showHighlight
* @param showUnHighlight
*/@SuppressWarnings("deprecation")
public void tsjiSelectionChanged(String range, String text, String handleBounds, String menuBounds){
try {
//Log.d(TAG, "tsjiSelectionChanged :- handleBounds " + handleBounds);
JSONObject selectionBoundsObject = new JSONObject(handleBounds);
float scale = getDensityIndependentValue(this.getScale(), ctx);
Rect handleRect = new Rect();
handleRect.left = (int) (getDensityDependentValue(selectionBoundsObject.getInt("left"), getContext()) * scale);
handleRect.top = (int) (getDensityDependentValue(selectionBoundsObject.getInt("top"), getContext()) * scale);
handleRect.right = (int) (getDensityDependentValue(selectionBoundsObject.getInt("right"), getContext()) * scale);
handleRect.bottom = (int) (getDensityDependentValue(selectionBoundsObject.getInt("bottom"), getContext()) * scale);
this.mSelectionBounds = handleRect;
this.selectedRange = range;
this.selectedText = text;
JSONObject menuBoundsObject = new JSONObject(menuBounds);
Rect displayRect = new Rect();
displayRect.left = (int) (getDensityDependentValue(menuBoundsObject.getInt("left"), getContext()) * scale);
displayRect.top = (int) (getDensityDependentValue(menuBoundsObject.getInt("top") - 25, getContext()) * scale);
displayRect.right = (int) (getDensityDependentValue(menuBoundsObject.getInt("right"), getContext()) * scale);
displayRect.bottom = (int) (getDensityDependentValue(menuBoundsObject.getInt("bottom") + 25, getContext()) * scale);
if(!this.isInSelectionMode()){
this.startSelectionMode();
}
// This will send the menu rect
this.showContextMenu(displayRect);
drawSelectionHandles();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Receives the content width for the page.
*/
public void tsjiSetContentWidth(float contentWidth){
this.contentWidth = (int) this.getDensityDependentValue(contentWidth, ctx);
}
//*****************************************************
//*
//* Density Conversion
//*
//*****************************************************
/**
* Returns the density dependent value of the given float
* @param val
* @param ctx
* @return
*/
public float getDensityDependentValue(float val, Context ctx){
// Get display from context
Display display = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
// Calculate min bound based on metrics
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
return val * (metrics.densityDpi / 160f);
}
/**
* Returns the density independent value of the given float
* @param val
* @param ctx
* @return
*/
public float getDensityIndependentValue(float val, Context ctx){
// Get display from context
Display display = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
// Calculate min bound based on metrics
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
return val / (metrics.densityDpi / 160f);
}
}
提前致谢！
答案 0 :(得分：4)
我意识到这是一个老问题，但没有一个公认的答案，所提供的答案都没有多少票。
通过创建自定义操作模式回调，我已经实现了您要完成的任务。这允许在用户长按视图时（在WebView的情况下）创建自定义上下文操作栏（CAB）。 注意：这仅适用于4.0+，一件仅适用于4.4。
创建一个包含自定义菜单布局的新Android XML文件。这是我的（context_menu.xml）作为例子：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/copy"
android:icon="@drawable/ic_action_copy"
android:showAsAction="always" <!-- Forces this button to be shown -->
android:title="@string/copy">
</item>
<item
android:id="@+id/button2"
android:icon="@drawable/menu_button2icon"
android:showAsAction="ifRoom" <!-- Show if there is room on the screen-->
android:title="@string/button2">
</item>
<!-- Add as many more items as you want.
Note that if you use "ifRoom", an overflow menu will populate
to hold the action items that did not fit in the action bar. -->
</menu>
现在已经定义了菜单，为它创建一个回调：
public class CustomWebView extends WebView {
private ActionMode.Callback mActionModeCallback;
private class CustomActionModeCallback implements ActionMode.Callback {
// Called when the action mode is created; startActionMode() was called
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// Inflate a menu resource providing context menu items
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
return true;
}
// Called each time the action mode is shown.
// Always called after onCreateActionMode, but
// may be called multiple times if the mode is invalidated.
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// Note: This is called every time the selection handlebars move.
return false; // Return false if nothing is done
}
// Called when the user selects a contextual menu item
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch (item.getItemId()) {
case R.id.copy:
// Do some stuff for this button
mode.finish(); // Action picked, so close the CAB
return true;
case R.id.button2:
// Do some stuff for this button
mode.finish();
return true;
// Create a case for every item
...
default:
mode.finish();
return false;
}
}
// Called when the user exits the action mode
@Override
public void onDestroyActionMode(ActionMode mode) {
// This will clear the selection highlight and handlebars.
// However, it only works in 4.4; I am still investigating
// how to reliably clear the selection in 4.3 and earlier
clearFocus();
}
}
一旦这些部分到位，覆盖startActionMode方法，以便在长按一下实际发生回调：
public class CustomWebView extends WebView {
@Override
public ActionMode startActionMode(Callback callback) {
ViewParent parent = getParent();
if (parent == null) {
return null;
}
mActionModeCallback = new CustomActionModeCallback();
return parent.startActionModeForChild(this, mActionModeCallback);
}
}
现在，您有一个自定义菜单，当用户长按您的WebView时，该菜单会显示并填充。作为参考，我从Android Developer tutorial找到了此信息，并修改了this answer中的建议。
最后一点：此技术会覆盖所选文本的本机复制/粘贴菜单。如果要保留该功能，则需要自己实现。 （这就是我的第一个按钮是＆＃39; copy＆＃39 ;.）如果您需要，请参阅this Google tutorial以获取更多信息以及实施它的正确方法。
答案 1 :(得分：2)
使用setOnTouchListener（）进行长/短长按。并返回true，以便不会发生任何事情，从而覆盖默认文本选择功能。
答案 2 :(得分：1)
我能够解决这个问题。我也面临这个问题，在网上找不到任何解决方案。
因此，如果您设置LongClick侦听器，Webview将完全停止显示选择。深入研究Webview代码后，我发现它正在调用WebView的方法startRunMode并传递一个SelectActionCallbackMode类的实例。
我只是扩展了Webview类并重写了startRunMode方法，如下所示：
public ActionMode startActionMode(ActionMode.Callback callback)
{
actionModeCallback = new CustomizedSelectActionModeCallback();
return super.startActionMode(actionModeCallback);
}
这迫使Webview显示我的Callback，而不是显示Webview的默认值。这确保了选择像以前一样顺利进行，每次选择时都会显示我的CAB。唯一需要注意的是，我必须自己编写代码来解雇CAB。
在4.1,4.2和4.3设备上测试。
希望这有帮助。
答案 3 :(得分：0)
我可以建议一个解决方法。
您可以使用setOnTouchListener然后自己实施长按。
onTouch --
case MotionEvent.ACTION_DOWN:
mHanlder.removeCallbacks(startActionBar);
mHandler.postDelayed(startActionBar,1000);
这样你就可以达到相同的效果。
答案 4 :(得分：0)
KeyEvent down＆amp; amp; up在API LEVEL 16+（Android 4.1+ JELLY_BEAN）中不起作用。它不会触发WebView的loadUrl。所以我不得不用dispatchTouchEvent替换dispatchKeyEvent。这是代码：
...
MotionEvent touchDown = MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, touchX, touchY, 0);
webView.dispatchTouchEvent(touchDown);
touchDown.recycle();
MotionEvent touchUp = MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, touchX, touchY, 0);
webView.dispatchTouchEvent(touchUp);
touchUp.recycle();
String url = mUrl;
...
试试..
答案 5 :(得分：0)
要从webview中禁用文本选择，请尝试使用
webView.setWebChromeClient(new WebChromeClient(){
[.... other overrides....]
// @Override
// https://bugzilla.wikimedia.org/show_bug.cgi?id=31484
// If you DO NOT want to start selection by long click,
// the remove this function
// (All this is undocumented stuff...)
public void onSelectionStart(WebView view) {
// By default we cancel the selection again, thus disabling
// text selection unless the chrome client supports it.
// view.notifySelectDialogDismissed();
}
});
答案 6 :(得分：0)
您也可以尝试重写View.performLongClick（），它负责调用View.onLongPress（）。你也可以试着去查看父View的长按事件。或者一直到您活动的Window.Callback（通过Activity.getWindow（）。get / setCallback（））。
我想知道除了长按事件之外是否还有其他方式可以显示标准选择上下文菜单，例如可能使用轨迹球或硬件键盘。
答案 7 :(得分：0)
如果有人试图简单地删除默认文本选择，我在Android 4.1.2上的Samsung Galaxy Tab上遇到了同样的问题，最后写了我自己的WebView：
public class CustomWebView extends WebView {
public CustomWebView(Context context) {
super(context);
this.setUp(context);
}
public CustomWebView(Context context, AttributeSet attrs) {
super(context, attrs);
this.setUp(context);
}
public CustomWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.setUp(context);
}
private void setUp(Context context) {
this.setOnLongClickListener(new OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return true;
}
});
this.setLongClickable(false);
}
@Override
public boolean performLongClick() {
return true;
}
}
并在我的xml中引用它：
<com...CustomWebView
android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
答案 8 :(得分：0)
使用setOnTouchListener（）实现长按