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在开发过程中有时候会遇到特定情况下显示蒙层的需求,比如在点击某个Edittext搜索框时,部分界面出现浅透明蒙层:
自定义蒙层:
/**
* Created by Luzj on 2018/8/18.
*
* 自定义拦截点击蒙层
*/
public class Mongolian extends LinearLayout {
private OnClickMongoListener mListener;
public Mongolian(Context context) {
super(context);
}
public Mongolian(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public Mongolian(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public Mongolian(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
protected void dispatchDraw(Canvas canvas) {
Paint p = new Paint();
p.setColor(Color.parseColor("#88000000"));
canvas.drawRect(0, 0, getWidth(), getHeight(), p);
super.dispatchDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mListener.onMongoClick();
return true;
}
public void setMongoClickListener(OnClickMongoListener listener) {
mListener = listener;
}
//蒙层点击事件
public interface OnClickMongoListener {
void onMongoClick();
}
}
在xml布局中声明:
<!--蒙层-->
<com.uhome.base.module.owner.ui.Mongolian
android:id="@+id/mongolian"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/city_bar"
android:background="#88000000"
android:orientation="vertical"
android:visibility="gone"
/>
在Activity中初始化蒙层点击事件监听:
/**
* 蒙层点击事件
*/
private Mongolian.OnClickMongoListener onClickMongoListener = new Mongolian.OnClickMongoListener() {
@Override
public void onMongoClick() {
//do something
if(isMongoShow) {
showMongo(false);
}
hideKeyBoard(searchEt);
}
};
/**
* 是否展示蒙层
*/
private void showMongo(boolean isShow) {
if(isShow) {
ll.setVisibility(View.VISIBLE);
isMongoShow = true;
}else {
ll.setVisibility(View.GONE);
isMongoShow = false;
}
}
在Activity中声明和调用:
Mongolian ll = (Mongolian) findViewById(R.id.mongolian);
ll.setMongoClickListener(onClickMongoListener);
……
ll.setVisibility(View.VISIBLE);