安卓 实现后台更新应用

第三方安装库：

//工具库
implementation 'com.blankj:utilcode:1.25.9'

import android.app.AlertDialog;
import android.app.DownloadManager;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.provider.Settings;
import android.widget.Toast;

import java.io.File;


/**
 * 后台更新
 *
 */
public class UpdateService  {
    private DownloadManager mDownloadManager;
    private Context mContext;
    private long downloadId;
    private String apkName;

    public UpdateService() {

    }
    public UpdateService(Context context) {
        mContext = context;
    }

    public void download(String url, String name) {
        final String packageName = "com.android.providers.downloads";
        int state = mContext.getPackageManager().getApplicationEnabledSetting(packageName);
        //检测下载管理器是否被禁用
        if (state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_UNTIL_USED) {
            AlertDialog.Builder builder = new AlertDialog.Builder(mContext).setTitle("温馨提示").setMessage
                    ("系统下载管理器被禁止，需手动打开").setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                    try {
                        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        intent.setData(Uri.parse("package:" + packageName));
                        mContext.startActivity(intent);
                    } catch (ActivityNotFoundException e) {
                        Intent intent = new Intent(Settings.ACTION_MANAGE_APPLICATIONS_SETTINGS);
                        mContext.startActivity(intent);
                    }
                }
            }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
            builder.create().show();
        } else {
            //正常下载流程
            apkName = name;
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setAllowedOverRoaming(false);

            //通知栏显示
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setTitle(AppUtils.getAppName(mContext));
            request.setDescription("正在下载中...");
            request.setVisibleInDownloadsUi(true);

            //设置下载的路径
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, apkName + ".apk");

            //获取DownloadManager
            mDownloadManager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
            downloadId = mDownloadManager.enqueue(request);

            mContext.registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
        }
    }

    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkStatus();
        }
    };

    /**
     * 检查下载状态
     */
    private void checkStatus() {
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(downloadId);
        Cursor cursor = mDownloadManager.query(query);
        if (cursor.moveToFirst()) {
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            switch (status) {
                //下载暂停
                case DownloadManager.STATUS_PAUSED:
                    break;
                //下载延迟
                case DownloadManager.STATUS_PENDING:
                    break;
                //正在下载
                case DownloadManager.STATUS_RUNNING:
                    break;
                //下载完成
                case DownloadManager.STATUS_SUCCESSFUL:
                    installAPK();
                    break;
                //下载失败
                case DownloadManager.STATUS_FAILED:
                    Toast.makeText(mContext, "下载失败", Toast.LENGTH_SHORT).show();
                    break;
            }
        }
        cursor.close();
    }

    /**
     * 安装
     */
    private void installAPK() {

        File apkFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), apkName + ".apk");

        com.blankj.utilcode.util.AppUtils.installApp(apkFile);

    }

}

使用：

        now_update.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                UpdateService updateService = new UpdateService(MaintActivity.this);
                updateService.download(url , "");
               
            }
        });
                

AppUtils

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.Window;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class AppUtils {

    Context context;
    private static AlertDialog dialog;

    /**
    * 获取应用程序名称
    */
   public static synchronized String getAppName(Context context) {
       try {
           PackageManager packageManager = context.getPackageManager();
           PackageInfo packageInfo = packageManager.getPackageInfo(
                   context.getPackageName(), 0);
           int labelRes = packageInfo.applicationInfo.labelRes;
           return context.getResources().getString(labelRes);
       } catch (Exception e) {
           e.printStackTrace();
       }
       return null;
   }

    /**
     * 获取当前app version name
     */
    public static String getAppVersionName(Context context) {
        String appVersionName = "";
        try {
            PackageInfo packageInfo = context.getApplicationContext()
                    .getPackageManager()
                    .getPackageInfo(context.getPackageName(), 0);
            appVersionName = packageInfo.versionName;
        } catch (PackageManager.NameNotFoundException e) {

        }
        return appVersionName;
    }


    /**
     * 获取图标 bitmap
     * @param context
     * @return
     */
    public static synchronized String getBitmap(Context context) {
        PackageManager packageManager = null;
        ApplicationInfo applicationInfo = null;
        try {
            packageManager = context.getApplicationContext()
                    .getPackageManager();
            applicationInfo = packageManager.getApplicationInfo(
                    context.getPackageName(), 0);
        } catch (PackageManager.NameNotFoundException e) {
            applicationInfo = null;
        }
        Drawable d = packageManager.getApplicationIcon(applicationInfo); //xxx根据自己的情况获取drawable
        BitmapDrawable bd = (BitmapDrawable) d;
        Bitmap bm = bd.getBitmap();
        return String.valueOf(bm);
    }


    /**
     * 将图片保存到系统相册
     *
     * @param context
     * @param bmp
     */
    public static void saveImageToGallery(Context context, Bitmap bmp) {
        // 首先保存图片
        File appDir = new File(Environment.getExternalStorageDirectory(), "***");
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        String fileName = System.currentTimeMillis() + ".jpg";
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 其次把文件插入到系统图库
        try {
            MediaStore.Images.Media.insertImage(context.getContentResolver(),
                    file.getAbsolutePath(), fileName, null);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        // 最后通知图库更新
        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(new File(file.getPath()))));
        // 弹出保存图片的对话框
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setMessage("保存成功\n\n1.打开微信扫描 相册二维码\n\n2.点击关注并绑定");
        builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialog.cancel();
            }
        });
        dialog = builder.create();
        Window window = dialog.getWindow();
        window.setWindowAnimations(R.style.AlertAnimation);
        dialog.show();
    }


}

R.style.AlertAnimation // 从屏幕中间 由小到大的展开

    <!-- AlertDialog 的动画效果 -->
    <style name="AlertAnimation">
        <item name="android:windowExitAnimation">@anim/alert_cancel</item>
        <item name="android:windowEnterAnimation">@anim/alert_in</item>
    </style>

alert_cancel.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="400"
    >
    <scale
        android:fromXScale="1.0"
        android:fromYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="0.0"
        android:toYScale="0.0" />
</set>

alert_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="400"
    >
    <scale
        android:fromXScale="0.0"
        android:fromYScale="0.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="1.0"
        android:toYScale="1.0"
        />
</set>