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: 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: android:src='http://www.gepszalag.com/bcjs/@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

點擊事件

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);//相對于父控件的底部顯示 無任何偏移popWnd.showAtLocation(v, Gravity.BOTTOM, 0, 0);

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