给TextView的drawableRight属性设置点击事件

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由于需求,要给TextView的drawableRight图片设置点击事件
像这样
其实更多的可能是EditText,像登录框那样的,其实都一样
上代码

/** * Created by great小海海 on 2016/11/30 0030. * 只是加了右侧图标的点击事件 */public class DrawableTextView extends TextView{    public DrawableRightClickListener drawableRightClickListener;    public DrawableTextView(Context context) {        super(context);    }    public DrawableTextView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public DrawableTextView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    public DrawableRightClickListener getDrawableRightClick() {        return drawableRightClickListener;    }    public void setDrawableRightClick(DrawableRightClickListener drawableRightClickListener) {        this.drawableRightClickListener = drawableRightClickListener;    }//为了方便,直接写了一个内部类的接口    public interface DrawableRightClickListener{        void onDrawableRightClickListener(View view);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()){            case MotionEvent.ACTION_DOWN:                if (drawableRightClickListener!=null){                    // getCompoundDrawables获取是一个数组，数组0,1,2,3,对应着左，上，右，下 这4个位置的图片，如果没有就为null                    Drawable rightDrawable=getCompoundDrawables()[2];                    //判断的依据是获取点击区域相对于屏幕的x值比我(获取TextView的最右边界减去边界宽度)大就可以判断点击在Drawable上                    if(rightDrawable!=null&&event.getRawX()>=(getRight()-rightDrawable.getBounds().width())){                        drawableRightClickListener.onDrawableRightClickListener(this);                    }                    //此处不能设置成false,否则drawable不会触发点击事件,如果设置,TextView会处理事件                    return false;                }                break;        }        return super.onTouchEvent(event);    }

应用很简单
布局

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.administrator.textviewdrawable.MainActivity">    <com.example.administrator.textviewdrawable.DrawableTextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="点击右边的图片试试"        android:textSize="30sp"        android:layout_centerInParent="true"        android:drawableRight="@mipmap/ic_launcher"        android:id="@+id/draw_tv"/></RelativeLayout>

public class MainActivity extends AppCompatActivity {    private DrawableTextView tv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv = (DrawableTextView) findViewById(R.id.draw_tv);        tv.setDrawableRightClick(new DrawableTextView.DrawableRightClickListener() {            @Override            public void onDrawableRightClickListener(View view) {                Toast.makeText(MainActivity.this, "已收到点击指令", Toast.LENGTH_SHORT).show();            }        });    }

效果图
这里写图片描述

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