TinyMCE：添加复杂格式(TinyMCE: Add complex format)

 这是我如何做到的。 在我的InputConnection我重写getTextBeforeCursor以始终返回" "以便IME始终认为它至少可以删除一个字符。 
 
 我还将连接的输入类型设置为InputType.TYPE_NULL以便传递关键事件（来自Google的官方解决方法）。 
 
 我的自定义EditText ： 
 
public class InterceptTextView extends EditText {
    public interface OnBackspacePressListener {
        public void onBackspacePressed();
    }

    private OnBackspacePressListener backspaceListener;


    public InterceptTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setText(" ");
    }

    public void setOnBackspacePressListener(OnBackspacePressListener backspaceListener) {
        this.backspaceListener = backspaceListener;
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_DEL) {
            if(backspaceListener != null) {
                backspaceListener.onBackspacePressed();
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        outAttrs.actionLabel = null;
        outAttrs.inputType = InputType.TYPE_NULL;

        BaseInputConnection connection = new BaseInputConnection(this, false) {    

            @Override
            public String getTextBeforeCursor(int ignore, int ignore2) {
                return " ";
            }
        };
        return connection;
    }
}
 
 我的Fragment ： 
 
public class KeyFragment extends Fragment {
    private static volatile boolean backspacePressed = false;

    private InterceptTextView et;

    private TextWatcher textWatcher = new TextWatcher() {       
        @Override
        public void afterTextChanged(Editable s) {
            if(backspacePressed) {
                backspacePressed = false;
                return;
            }
            else {
                Logger.i("" + s.charAt(s.length() - 1));    
            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {}
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.keyboard, null);
        et = (InterceptTextView) v.findViewById(R.id.keyboard_input_sink);
        et.setOnBackspacePressListener(new OnBackspacePressListener() {

            @Override
            public void onBackspacePressed() {
                backspacePressed = true;
                Logger.i("BCKSPC");
            }

        });
        et.addTextChangedListener(textWatcher);
        return v;
    }
}

Here's how I did it. In my InputConnection I override getTextBeforeCursor to always to return " " so that the IME always thinks that there's at least one character it can delete.
 
I also set the input type of the connection to InputType.TYPE_NULL so that key events will be delivered (official workaround from Google).
 
My custom EditText:
 
public class InterceptTextView extends EditText {
    public interface OnBackspacePressListener {
        public void onBackspacePressed();
    }

    private OnBackspacePressListener backspaceListener;


    public InterceptTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setText(" ");
    }

    public void setOnBackspacePressListener(OnBackspacePressListener backspaceListener) {
        this.backspaceListener = backspaceListener;
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_DEL) {
            if(backspaceListener != null) {
                backspaceListener.onBackspacePressed();
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        outAttrs.actionLabel = null;
        outAttrs.inputType = InputType.TYPE_NULL;

        BaseInputConnection connection = new BaseInputConnection(this, false) {    

            @Override
            public String getTextBeforeCursor(int ignore, int ignore2) {
                return " ";
            }
        };
        return connection;
    }
}
 
My Fragment:
 
public class KeyFragment extends Fragment {
    private static volatile boolean backspacePressed = false;

    private InterceptTextView et;

    private TextWatcher textWatcher = new TextWatcher() {       
        @Override
        public void afterTextChanged(Editable s) {
            if(backspacePressed) {
                backspacePressed = false;
                return;
            }
            else {
                Logger.i("" + s.charAt(s.length() - 1));    
            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {}
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.keyboard, null);
        et = (InterceptTextView) v.findViewById(R.id.keyboard_input_sink);
        et.setOnBackspacePressListener(new OnBackspacePressListener() {

            @Override
            public void onBackspacePressed() {
                backspacePressed = true;
                Logger.i("BCKSPC");
            }

        });
        et.addTextChangedListener(textWatcher);
        return v;
    }
}