布局文件
activity_test.xml
<?xml version="1.0" encoding="utf-8"?
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
<LinearLayout
android:id="@+id/linearLayout"
android:orientation="vertical"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="@color/colorAccent"
android:layout_width="match_parent"
android:layout_height="300dp"
</LinearLayout
<View
android:layout_width="match_parent"
android:layout_height="100dp"
app:layout_constraintTop_toTopOf="@+id/linearLayout"
app:layout_constraintBottom_toTopOf="@+id/linearLayout"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:alpha="0"
android:background="@android:color/white"
/
<ImageView
android:id="@+id/image"
android:src="@mipmap/ic_launcher"
app:layout_constraintTop_toTopOf="@+id/linearLayout"
app:layout_constraintBottom_toTopOf="@+id/linearLayout"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginTop="100dp"
android:layout_width="100dp"
android:layout_height="100dp"/
</androidx.constraintlayout.widget.ConstraintLayout
MainActivity.java
点击事件
View contentView = LayoutInflater.from(MainActivity.this).inflate(R.layout.activity_test, null);
PopupWindow popWnd = new PopupWindow(MainActivity.this);
popWnd.setContentView(contentView);
popWnd.setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
popWnd.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
popWnd.setBackgroundDrawable(new ColorDrawable(0x00000000));
popWnd.setOutsideTouchable(false);
popWnd.setFocusable(true);
//相对于父控件的底部显示 无任何偏移
popWnd.showAtLocation(v, Gravity.BOTTOM, 0, 0);
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