记一次使用 android 自带 WebView 做富文本编辑器之API、机型的兼容及各种奇葩bug的解决

 1 mEditor.setOnTouchListener(new View.OnTouchListener() {
 2             @Override
 3             public boolean onTouch(View v, MotionEvent event) {
 4                 WebView temp = (WebView) v;
 5                 WebView.HitTestResult mResult = temp.getHitTestResult();
 6                 if(mResult==null){
 7                     Log.d("zzzzz","mResult==null");
 8                     if(mEditor.getHitTestResult()==null){
 9                         Log.d("zzzzz","mEditor mResult==null");
10                     }
11                 }else {
12                     final int type = mResult.getType();
13                     switch (type) {
14                         case WebView.HitTestResult.ANCHOR_TYPE:
15                         case WebView.HitTestResult.SRC_ANCHOR_TYPE:
16                             //点击的是链接
17                             break;
18 
19                         case WebView.HitTestResult.IMAGE_TYPE:
20                         case WebView.HitTestResult.IMAGE_ANCHOR_TYPE:
21                         case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
22                             Log.d("zzzzz", "hit image");
23                             String strUrl = mResult.getExtra(); // 获取该 img标签里面的 src
24                            // Class s = mResult.getClass();
25                             if(strUrl==null){
26                                 Log.d("zzzzz", "image src is null");
27                             }else{
28                                 Log.d("zzzzz", "fucking success "+strUrl);
29                                 showDeleteDialog(strUrl); // 
30                             }
31                             //点击的是图片
32                             temp.clearFocus();
33                             mEditor.clearFocusEditor();
34                             return true;
35                         default:
36                             Log.d("zzzzz", "hit white");
37                             //点击的是空白处
38                             break;
39                     }
40                 }
41                 Log.d("zzzzz","show me the fucking info");
42                 return false;
43             }
44         });

 1 public class PrivateApiBridgeMode {
 2     private static final int EXECUTE_JS = 194;
 3     
 4     Method handler;
 5     Object webViewCore;
 6     boolean initFailed;
 7 
 8     @SuppressWarnings("rawtypes")
 9     private void initReflection(WebView webView) {
10         Object webViewObject = webView;
11         Class webViewClass = WebView.class;
12         try {
13             Field f = webViewClass.getDeclaredField("mProvider"); // mProvider 是WebView的一个借口成员，我们找到它
14             f.setAccessible(true);  // 设置可访问
15             webViewObject = f.get(webView); // 拿到对象
16             webViewClass = webViewObject.getClass(); // webView 类
17         } catch (Throwable e) {
18             Log.d("zzzzz","initReflection Throwable "+e.toString() );
19         }
20         
21         try {
22             Field f = webViewClass.getDeclaredField("mWebViewCore");
23             f.setAccessible(true);
24             webViewCore = f.get(webViewObject);
25             if (webViewCore != null) {
26                 handler = webViewCore.getClass().getDeclaredMethod("sendMessage", Message.class);
27                 handler.setAccessible(true);
28             }
29         } catch (Throwable e) {
30             initFailed = true;
31         }
32     }
33     
34     public void onNativeToJsMessageAvailable(WebView webView,String js) {
35         if (handler == null && !initFailed) {
36             initReflection(webView);
37         }
38         if (handler != null) {
39             Message execJsMessage = Message.obtain(null, EXECUTE_JS, js); // 阻断
40             try {
41                 handler.invoke(webViewCore, execJsMessage);
42             } catch (Throwable e) {
43                 Log.d("zzzzz","onNativeToJsMessageAvailable Throwable "+e.toString() );
44             }
45         }
46     }
47 } 

 1 // 重写该函数
 2     @Override
 3     public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
 4         return new myInputConnection(super.onCreateInputConnection(outAttrs),true);
 5     }
 6     
 7     private class myInputConnection extends InputConnectionWrapper {
 8 
 9         public myInputConnection(InputConnection target, boolean mutable) {
10             super(target, mutable);
11         }
12 
13         @Override
14         public boolean sendKeyEvent(KeyEvent event) {
15             if (event.getAction() == KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_DEL) {
16                 if (deleteKeyListener != null) {
17                     deleteKeyListener.onDeleteClick(); // 执行删除键的事件接口
18                     return true;
19                 }
20             }else{
21                 Log.d("zzzzz","fuck key");
22             }
23             return super.sendKeyEvent(event);
24         }
25 
26         @Override
27         public boolean deleteSurroundingText(int beforeLength, int afterLength) {
28             if (beforeLength == 1 && afterLength == 0) {
29                 return sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN,
30                         KeyEvent.KEYCODE_DEL))
31                         && sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP,
32                         KeyEvent.KEYCODE_DEL));
33             }
34             return super.deleteSurroundingText(beforeLength, afterLength);
35         }
36     }
37 
38     private OnDeleteKeytListener deleteKeyListener;
39 
40     public void OnDeleteKeytListener(OnDeleteKeytListener delKeyEventListener) {
41         this.deleteKeyListener = deleteKeyListener;
42     }
43 
44     public interface OnDeleteKeytListener {
45         void onDeleteClick();
46     }