Android 实现隐私政策提示弹窗

button_shape.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--相当于做了一张圆角的图片,然后给button作为背景图片-->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!--设置背景色-->
    <solid android:color="#F59E27" />
    <!--设置圆角-->
    <corners android:radius="105dip" />
    <padding
        android:bottom="2dp"
        android:left="33dp"
        android:right="33dp"
        android:top="2dp">
    </padding>
</shape>

dialog_privacy_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 填充色 -->
    <solid android:color="#ffffff" />
    <!-- 矩形圆角半径 -->
    <corners android:radius="10dp" />
</shape>

dialog_privacy_show.xml

<?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="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/dialog_privacy_shape"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@+id/ll_btn_bottom"
            android:layout_marginBottom="15dp"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/tv_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_marginBottom="10dp"
                android:text="隐私政策授权提示"
                android:textColor="#000000"
                android:textSize="18sp" />

            <ScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:fadingEdgeLength="50dp"
                android:requiresFadingEdge="horizontal">

                <TextView
                    android:id="@+id/tv_content"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginTop="10dp"
                    android:singleLine="false"
                    android:text=""
                    android:textColor="#000000" />
            </ScrollView>
        </LinearLayout>

        <LinearLayout
            android:id="@+id/ll_btn_bottom"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:gravity="center"

            >
            <Button
                android:id="@+id/btn_agree"
                android:layout_width="130dp"
                android:layout_height="wrap_content"
                android:layout_marginBottom="2dp"
                android:layout_marginRight="15dp"
                android:text="同意"
                android:onClick="onClickAgree"
                android:textColor="#FF0006"
                android:background="@drawable/button_shape"/>
            <Button
                android:id="@+id/btn_disagree"
                android:layout_width="130dp"
                android:layout_marginBottom="2dp"
                android:layout_height="wrap_content"
                android:text="放弃使用"
                android:onClick="onClickDisagree"
                android:textColor="#000000"
                android:background="@drawable/button_shape"/>

        </LinearLayout>
    </RelativeLayout>
</LinearLayout>

新建assets文件夹

将隐私内容 privacy.txt 放入到assets文件夹中

activity_main.xml

<LinearLayout android:layout_width="match_parent"
    android:layout_height="30dp"
    android:orientation="horizontal"
    android:gravity="center"
    xmlns:android="http://schemas.android.com/apk/res/android">

</LinearLayout>

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlertDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

public class MainActivity extends AppCompatActivity {
    Dialog dialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        showPrivacy("privacy.txt");//放在assets目录下的隐私政策文本文件
    }
    public void onClickAgree(View v)
    {
        dialog.dismiss();
    }
    public void onClickDisagree(View v)
    {
        finish();
    }
    public void showPrivacy(String privacyFileName)
    {
        String str = initAssets(privacyFileName);
        final View inflate = LayoutInflater.from(MainActivity.this).inflate(R.layout.dialog_privacy_show, null);
        TextView tv_title = (TextView) inflate.findViewById(R.id.tv_title);
        tv_title.setText("隐私政策授权提示");
        TextView tv_content = (TextView) inflate.findViewById(R.id.tv_content);
        tv_content.setText(str);
        dialog = new AlertDialog
                .Builder(MainActivity.this)
                .setView(inflate)
                .show();
        // 通过WindowManager获取
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        final WindowManager.LayoutParams params = dialog.getWindow().getAttributes();
        params.width = dm.widthPixels*4/5;
        params.height = dm.heightPixels*1/2;
        dialog.getWindow().setAttributes(params);
        dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
    }
    /**
     * 从assets下的txt文件中读取数据
     */
    public String initAssets(String fileName) {
        String str = null;
        try {
            InputStream inputStream = getAssets().open(fileName);

            str = getString(inputStream);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return str;
    }
    public static String getString(InputStream inputStream) {
        InputStreamReader inputStreamReader = null;
        try {
            inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }
        BufferedReader reader = new BufferedReader(inputStreamReader);
        StringBuffer sb = new StringBuffer("");
        String line;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line);
                sb.append("\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sb.toString();
    }

}