android监听虚拟键盘的退格键

什么都不说了，直接上代码

public class XZEditView extends EditText {
    public XZEditView(Context context) {
        super(context);
    }

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

    public XZEditView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public interface OnBackspacePressListener {
         void onBackspacePressed();
    }

    private OnBackspacePressListener backspaceListener;



    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;
    }
}

只需要实现OnBackspacePressListener 接口，就可以在onBackspacePressed方法中监听了