PopuWindow的使用

<?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"
android:id="@+id/rel"
tools:context="www.weshared.popuwindowdemo.MainActivity">

<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="@android:color/holo_red_light"
android:gravity="center"
android:padding="16dp"
android:text="Hello World!" />
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/darker_gray"
android:orientation="vertical"
tools:context="www.weshared.popuwindowdemo.MainActivity">

<TextView
android:id="@+id/tv_1"
style="@style/popu"
android:layout_marginBottom="1px"
android:text="后台打开" />

<TextView
android:id="@+id/tv_2"
style="@style/popu"
android:layout_marginBottom="1px"
android:text="新窗口打开" />

<TextView
android:id="@+id/tv_3"
style="@style/popu"
android:layout_marginBottom="1px"
android:text="复制链接地址" />

<TextView
android:id="@+id/tv_4"
style="@style/popu"
android:text="选择复制" />
</LinearLayout>

<!--android:layout_width="120dp"-->
<!--android:layout_height="40dp"-->
<!--android:gravity="center_vertical"-->
<!--android:background="@android:color/black"-->
<!--android:paddingLeft="8dp"-->
<!--android:textColor="@android:color/white"-->
<style name="popu">
<item name="android:layout_width">120dp</item>
<item name="android:layout_height">40dp</item>
<item name="android:gravity">center_vertical</item>
<item name="android:background">@android:color/black</item>
<item name="android:paddingLeft">8dp</item>
<item name="android:textColor">@android:color/white</item>
</style>

public class MainActivity extends AppCompatActivity implements View.OnLongClickListener, View.OnTouchListener, View.OnClickListener {

private int x;
private int y;
private PopupWindow popu;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}

private void init() {
RelativeLayout mRelativeLayout = (RelativeLayout) findViewById(R.id.rel);
TextView mTextView = (TextView) findViewById(R.id.tv);
if (mTextView == null || mRelativeLayout == null) {
return;
}
mTextView.setOnTouchListener(this);
mTextView.setOnClickListener(this);
mTextView.setOnLongClickListener(this);
mRelativeLayout.setOnClickListener(this);
}

private void initPopu(View v) {
//弹出一个popuwindow
View view = LayoutInflater.from(this).inflate(R.layout.popu_layout, null);
popu = new PopupWindow(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT);
popu.setContentView(view);
//展示的位置
popu.showAtLocation((View) v.getParent(), Gravity.NO_GRAVITY, x, y);//这里显示的效果是，按住哪里，锚点就在哪里
//popu展示的位置，是通过控件作为锚点，x,y是通过params设置离锚点的位置。
//        popu.showAsDropDown(v);
//        popu.showAsDropDown(v,x,y);
//        popu.showAsDropDown(v,x,y,Gravity.START|Gravity.LEFT);//默认就是Gravity.START|Gravity.LEFT

final TextView tv1 = (TextView) view.findViewById(R.id.tv_1);
TextView tv2 = (TextView) view.findViewById(R.id.tv_2);
TextView tv3 = (TextView) view.findViewById(R.id.tv_3);
TextView tv4 = (TextView) view.findViewById(R.id.tv_4);

tv1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (popu!=null){
popu.dismiss();
}
Toast.makeText(getApplicationContext(),tv1.getText(),Toast.LENGTH_SHORT).show();
}
});
}

@Override
public boolean onLongClick(View v) {
initPopu(v);
return true;
}

@Override
public boolean onTouch(View v, MotionEvent event) {
//通过触摸的监听事件，拿到绝对坐标的x,y值
if (event.getAction() == MotionEvent.ACTION_DOWN) {
x = (int) event.getRawX();
y = (int) event.getRawY();
}
return false;
}

@Override
public void onClick(View v) {
//当popu显示是，点击消失
if (popu != null && popu.isShowing()) {
popu.dismiss();
}
}
}