popuwindow小案例

<?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>
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2.popuwindow中的布局文件

<?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>
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3.style.xml文件中，自定义一个popu的样式

<!--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>
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4.在MainActivity文件中

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();        }    }}