模仿某东商城的详情页面截屏会有弹窗事件的响应功能大体实现了,细节没做请不要纠结,进入正题。

对于系统级别截屏的监听,api中并没有针对于这个功能的监听回调等方法。我的首先想到的就是针对资源文件的监听。

思路如下：

1.对于系统级别的截图 肯定会保存到本地（机型不一样要注意适配，主要还是截图的命名方式不太一样）
2.对于资源文件监听时要判断是否是符合截图要求的（主要还是截图时间与当时时间差不能太大，否则会因为用户的其他操作影响到）
3.当检测到资源文件有变化查询最后一条并返回展示

话不多说上代码

MainActivity

import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import java.io.File;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private ImageView img;
    private ScreenShot mScreenShot;
    private TextView tvHelp;
    private TextView tvShare;
    private PopupWindow popupWindow;
    private LinearLayout linearLayout;
    private View showView;


    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
    }

    private void initView() {
        linearLayout = findViewById(R.id.linearLayout);
        showView = LayoutInflater.from(this).inflate(R.layout.layout_show_creenshot, null);

        popupWindow = new PopupWindow(showView,
                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
        img = showView.findViewById(R.id.show_img);
        tvHelp = showView.findViewById(R.id.tv_help);
        tvShare = showView.findViewById(R.id.tv_share);
        tvHelp.setOnClickListener(this);
        tvShare.setOnClickListener(this);
        popupWindow.setWidth(300);
        popupWindow.setHeight(500);



    }

    private void initData() {
        mScreenShot = ScreenShot.getInstance();
        handelSystemScreenShot();
    }

    private void handelSystemScreenShot() {
        if (!MainActivity.this.isFinishing()) {

            mScreenShot.register(MainActivity.this, new ScreenShot.CallbackListener() {
                @Override
                public void onShot(String path) {
                    final String pa = path;
                    Log.i("tag", "onShot: 成功:" + path);
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            img.setImageURI(Uri.fromFile(new File(pa)));
                            popupWindow.showAtLocation(linearLayout, Gravity.LEFT,0,0);

                        }
                    });

                }
            });
        } else {

            mScreenShot.unregister();
        }
    }

    @Override
    public void onClick(View v) {
        if(v.getId()==R.id.tv_help){
            Toast.makeText(MainActivity.this,"客服",Toast.LENGTH_LONG).show();
        }else {
            Toast.makeText(MainActivity.this,"分享",Toast.LENGTH_LONG).show();
        }
    }
    
    @Override
    protected void onDestroy() {
        mScreenShot.unregister();
        super.onDestroy();
    }
}

main布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/linearLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"

    tools:context=".MainActivity">


    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="80dp"
        android:background="@mipmap/ic_launcher"

         />


</LinearLayout>

ScreenShot 类

import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.os.HandlerThread;
import android.provider.MediaStore;


/**
 * 系统截屏监听工具，监听系统截屏，然后对截图进行处理
 */
public class ScreenShot {
    private static final String TAG = "ScreenShot";
    private static final String[] MEDIA_PROJECTIONS = {
            MediaStore.Images.ImageColumns.DATA,
            MediaStore.Images.ImageColumns.DATE_TAKEN,
            MediaStore.Images.ImageColumns.DATE_ADDED
    };

    /**
     * 截屏依据中的路径判断关键字
     */
    private static final String[] KEYWORDS = {
            "screenshot", "screen_shot", "screen-shot", "screen shot", "screencapture",
            "screen_capture", "screen-capture", "screen capture", "screencap", "screen_cap",
            "screen-cap", "screen cap"
    };

    private ContentResolver mContentResolver;
    private CallbackListener mCallbackListener;
    private MediaContentObserver mInternalObserver;
    private MediaContentObserver mExternalObserver;
    private static ScreenShot mInstance;

    private ScreenShot() {
    }

    /**
     * 获取 ScreenShot 对象
     *
     * @return ScreenShot对象
     */
    public static ScreenShot getInstance() {
        if (mInstance == null) {
            synchronized (ScreenShot.class) {
                mInstance = new ScreenShot();
            }
        }
        return mInstance;
    }

    /**
     * 注册
     *
     * @param context          上下文
     * @param callbackListener 回调监听
     */
    public void register(Context context, CallbackListener callbackListener) {
        mContentResolver = context.getContentResolver();
        mCallbackListener = callbackListener;

        HandlerThread handlerThread = new HandlerThread(TAG);
        handlerThread.start();
        Handler handler = new Handler(handlerThread.getLooper());

        mInternalObserver = new MediaContentObserver(MediaStore.Images.Media.INTERNAL_CONTENT_URI, handler);
        mExternalObserver = new MediaContentObserver(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, handler);

        mContentResolver.registerContentObserver(MediaStore.Images.Media.INTERNAL_CONTENT_URI,
                true, mInternalObserver);
        mContentResolver.registerContentObserver(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                true, mExternalObserver);
    }

    /**
     * 注销
     */
    public void unregister() {
        if (mContentResolver != null) {
            mContentResolver.unregisterContentObserver(mInternalObserver);
            mContentResolver.unregisterContentObserver(mExternalObserver);
        }
    }

    private void handleMediaContentChange(Uri uri) {
        Cursor cursor = null;
        try {
            // 数据改变时，查询数据库中最后加入的一条数据
            cursor = mContentResolver.query(uri, MEDIA_PROJECTIONS, null, null,
                    MediaStore.Images.ImageColumns.DATE_ADDED + " desc limit 1");
            if (cursor == null) {
                return;
            }
            if (!cursor.moveToFirst()) {
                return;
            }
            int dataIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
            // 处理获取到的第一行数据
            handleMediaRowData(cursor.getString(dataIndex));
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (cursor != null && !cursor.isClosed()) {
                cursor.close();
            }
        }
    }

    /**
     * 处理监听到的资源
     */
    private void handleMediaRowData(String path) {
        long duration = 0;
        long step = 100;



        // 设置最大等待时间为1s，因为魅族的部分手机保存截图有延迟
        while (!checkScreenShot(path) && duration <= 1000) {
            try {
                duration += step;
                Thread.sleep(step);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        if (checkScreenShot(path)) {
            if (mCallbackListener != null) {
                //回调地址
                mCallbackListener.onShot(path);
            }
        }
    }



    private boolean checkScreenShot(String path) {
        if (path == null) {
            return false;
        }
        path = path.toLowerCase();
        for (String keyword : KEYWORDS) {
            //判断是否符合 截图命名规则(过滤)
            if (path.contains(keyword)) {
                return true;
            }
        }
        return false;
    }

    /**
     * 媒体内容观察者
     */
    private class MediaContentObserver extends ContentObserver {
        private Uri mUri;

        MediaContentObserver(Uri uri, Handler handler) {
            super(handler);
            mUri = uri;
        }

        @Override
        public void onChange(boolean selfChange) {
            super.onChange(selfChange);
            //Log.d("ScreenShot", "图片数据库发生变化：" + selfChange);
            handleMediaContentChange(mUri);
        }
    }

    /**
     * 回调监听器
     */
    public interface CallbackListener {
        /**
         * 截屏
         *
         * @param path 图片路径
         */
        void onShot(String path);
    }

}

弹窗

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:background="@color/colorBlack"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/show_img"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_share"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorBlack"
            android:gravity="center"
            android:text="分享页面"
            android:textColor="@color/colorWrite" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@color/colorWrite" />

        <TextView
            android:id="@+id/tv_help"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorBlack"
            android:gravity="center"
            android:text="问问客服"
            android:textColor="@color/colorWrite" />
    </LinearLayout>
</RelativeLayout>

关于这个还有几个点需要注意
由于是对系统资源变化的监听 所以会导致以下的问题

1.由于机型 厂商 版本等问题影响 会导致截屏图片 存储图片消耗的时间不同
2.删除图片资源时 也可能会调用 回调接口

解决:查询图片时也对图片的时间进行判断 目前暂定3秒(除人为极限操作)能够满足图片插入时间和删除回调的时间判断

系统在程序外截图也会通过过滤被程序检测到

1.添加过滤 因为系统截图时会自动带有截屏时间 截屏程序 以及存放位置 增加对于截屏程序包名过滤

已经找到和某东详情截图相同的方法了 已更新
码字不易,点赞收藏谢谢!!!