这个解决方案不依赖于Activity的Action模式，适用于所有的Android平台。
我试图回答，但它超出了字符限制，所以我会放一些代码部分
参考链接1：WebView的选择
https://github.com/btate/BTAndroidWebViewSelection
参考链接2：制作WebView标记
https://github.com/liufsd/WebViewMarker
以上两个链接都非常重要，并由一些优秀的开发人员开发。首先需要对来自参考链接1的TextSelectionSupport类进行一些研究。我在这里的选择监听器中自定义了TextSelectionSupport类的两行代码，以获取选择的矩形。
从这里克隆示例项目
https://github.com/ab-cse-2014/WebViewSelection.git
查看CustomWebView的实现和TextSelectionSupport类的使用。
这是我的项目中的WebView类
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.webkit.WebView;
import android.widget.PopupWindow;
import android.widget.Toast;
import com.cse.webviewtextselection.R;
import com.cse.webviewtextselection.webviewmaker.TextSelectionSupport;
public class CustomWebView extends WebView {
private final String TAG = this.getClass().getSimpleName();
private Context mContext;
private TextSelectionSupport mTextSelectionSupport;
private PopupWindow mPopupWindow;
private int currentTop;
public CustomWebView(Context context) {
super(context);
mContext = context;
initSetUp();
preparePopupWindow();
}
public CustomWebView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
initSetUp();
preparePopupWindow();
}
public CustomWebView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
initSetUp();
preparePopupWindow();
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public CustomWebView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
mContext = context;
initSetUp();
preparePopupWindow();
}
private void initSetUp() {
mTextSelectionSupport = TextSelectionSupport.support((AppCompatActivity) mContext, this);
mTextSelectionSupport.setSelectionListener(new TextSelectionSupport.SelectionListener() {
@Override
public void startSelection() {
}
@Override
public void selectionChanged(String text, Rect rect) {
Toast.makeText(mContext, text, Toast.LENGTH_SHORT).show();
showPopAtLocation(mPopupWindow, rect.left, rect.top);
}
@Override
public void endSelection() {
if (mPopupWindow != null) {
mPopupWindow.dismiss();
}
}
});
}
private void preparePopupWindow() {
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View customPopupView = layoutInflater.inflate(R.layout.custom_popup_layout, null);
mPopupWindow = new PopupWindow(customPopupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);
mPopupWindow.setAnimationStyle(android.R.style.Animation_Dialog);
}
private void showPopAtLocation(PopupWindow mPopupWindow, int x, int y) {
if (mPopupWindow != null) {
if (currentTop != 0 || currentTop > ((AppCompatActivity)mContext).getWindow().getDecorView().getHeight()) {
if (y > currentTop) {
y -= currentTop;
}
}
Log.d("Current Top : ", String.valueOf(currentTop));
Log.d("Y : ", String.valueOf(y));
mPopupWindow.showAtLocation(((AppCompatActivity)mContext).getWindow().getDecorView(), Gravity.NO_GRAVITY, x, y);
}
}
@Override
protected void onScrollChanged(int newLeft, int newTop, int oldLeft, int oldTop) {
currentTop = newTop;
super.onScrollChanged(newLeft, newTop, oldLeft, oldTop);
}
}
自定义弹出式菜单的XML（例如Android的智能文本选择(custom_popup_layout.xml)）。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/myCustomMenuLinearLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@android:color/transparent">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@android:color/white"
android:elevation="5dp"
android:layout_margin="12dp">
<TextView
android:id="@+id/menuOne"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mark With Color"
android:textColor="@android:color/black"
android:padding="10dp"
android:maxLines="1"/>
<TextView
android:id="@+id/menuTwo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mark As Important"
android:textColor="@android:color/black"
android:padding="10dp"
android:maxLines="1"/>
<TextView
android:id="@+id/menuThree"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show More"
android:textColor="@android:color/black"
android:padding="10dp"
android:maxLines="1"/>
</LinearLayout>
</LinearLayout>
输出屏幕截图
