android开发：PopupWindow制作选择弹框

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本文链接： https://blog.csdn.net/qq_39027256/article/details/102391137

效果如下图，点击按钮弹出对话框，背景颜色是半透明

一、PopupWindow的布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/btn_camera"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/function_feedback_bottom_dialog_shape_album"
            android:gravity="center"
            android:padding="15dp"
            android:text="拍照"
            android:textColor="#1079FF"
            android:textSize="18sp" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#f5f5f5" />


        <TextView
            android:id="@+id/btn_photo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/function_feedback_bottom_dialog_shape_camera"
            android:gravity="center"
            android:padding="15dp"
            android:text="相册"
            android:textColor="#1079FF"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/btn_cancel"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:background="@drawable/function_feedback_bottom_dialog_shape_cancel"
            android:gravity="center"
            android:padding="15dp"
            android:text="取消"
            android:textColor="#1079FF"
            android:textSize="18sp" />

    </LinearLayout>

</LinearLayout>

二、三个TextView的 android:background对应的文件

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:topLeftRadius="5dp"
             android:topRightRadius="5dp"/>
    <solid android:color="@color/white"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:bottomLeftRadius="5dp"
             android:bottomRightRadius="5dp"/>
    <solid android:color="@color/white"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="5dp"/>
    <solid android:color="@color/white"/>
</shape>

三、创建PopupWindow

    //解析布局文件
    View bottomView = View.inflate(context,           R.layout.layout_funtion_feedback_dialog, null);
    
 
    /**
     * 打开PopupWindow弹窗
     */
    private void showPop() {
        mPopupWindow = new PopupWindow(bottomView, -1, -2);
        mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        mPopupWindow.setOutsideTouchable(true);
        mPopupWindow.setFocusable(true);
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.alpha = 0.5f;
        getWindow().setAttributes(lp);
        mPopupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
            @Override
            public void onDismiss() {
                WindowManager.LayoutParams lp = getWindow().getAttributes();
                lp.alpha = 1f;
                getWindow().setAttributes(lp);
            }
        });
        mPopupWindow.setAnimationStyle(R.style.DialogWindowStyle);
        mPopupWindow.showAtLocation(getWindow().getDecorView(), Gravity.BOTTOM, 0, 0);
    }