android 检测新版本 更新安装 2019.6.14

动态权限申请

import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;


public class PermisionUtils {

    // Storage Permissions
    private static final int REQUEST_EXTERNAL_STORAGE = 1;
    private static String[] PERMISSIONS_STORAGE = {
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.WRITE_EXTERNAL_STORAGE};

    /**
     * Checks if the app has permission to write to device storage
     * If the app does not has permission then the user will be prompted to
     * grant permissions
     *
     * @param activity
     */
    public static void verifyStoragePermissions(Activity activity) {
        // Check if we have write permission
        int permission = ActivityCompat.checkSelfPermission(activity,
                Manifest.permission.WRITE_EXTERNAL_STORAGE);

        if (permission != PackageManager.PERMISSION_GRANTED) {
            // We don't have permission so prompt the user
            ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,
                    REQUEST_EXTERNAL_STORAGE);
        }
    }
}

从服务器获取版本 还有下载路径
如果有新版本则弹窗提示用户更新
用户确认后

 verifyStoragePermissions(CheapVersionActivity.this);   权限申请


    DownloadManager dManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
                                                    Uri uri = null;
                                                    String mesg = "";
                                                    try {
                                                        uri = Uri.parse(jsonObject.get("url").toString());//下载路径 http：//www.xxx.com/xxx.apk

                                                    } catch (JSONException e) {
                                                        e.printStackTrace();
                                                    }


                                                    Toast.makeText(CheapVersionActivity.this, "正在下载，请稍候", Toast.LENGTH_SHORT).show();
                                                    DownloadManager.Request req = new DownloadManager.Request(uri);
                                                    //设置网络状态下进行更新
                                                    req.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE|DownloadManager.Request.NETWORK_WIFI);
                                                    //下载中和下载完后都·显示通知栏
                                                    req.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                                                    //使用系统默认的下载路径 此处为应用内 /android/data/packages ,所以兼容7.0 8.0
                                                    req.setDestinationInExternalFilesDir(CheapVersionActivity.this, Environment.DIRECTORY_DOWNLOADS, "apk名称.apk");
                                                    //通知栏标题
                                                    req.setTitle("通知栏标题");
                                                    //通知栏描述信息
                                                    req.setDescription("下载中");
                                                    //设置类型为.apk
                                                    req.setMimeType("application/vnd.android.package-archive");
                                                    req.setVisibleInDownloadsUi(true);
                                                    SharedPreferences userPreference = getSharedPreferences("user", Context.MODE_PRIVATE);
                                                    SharedPreferences.Editor editor = userPreference.edit();

                                                    //获取下载任务ID
                                                    DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
                                                    downloadId=dm.enqueue(req);  //long类型
                                                    editor.putString("versionId",downloadId+"" );
                                                    editor.commit();
                                                    registerReceiver(new UpdataBroadcastReceiver(), new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

manifest.xml中

 <receiver android:name=".util.UpdataBroadcastReceiver">
            <intent-filter>
                <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
            </intent-filter>
        </receiver>

新建 UpdataBroadcastReceiver.class 全局消息

import android.annotation.SuppressLint;
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Build;

import com.tencent.mm.opensdk.utils.Log;

public class UpdataBroadcastReceiver extends BroadcastReceiver {

    private SharedPreferences sp;

    @SuppressLint("NewApi")
    public void onReceive(Context context, Intent intent) {
        sp = context.getSharedPreferences("user", Context.MODE_PRIVATE);
        DownloadManager dManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
        Intent install = new Intent(Intent.ACTION_VIEW);
        install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//        //根据id判断如果文件已经下载成功返回保存文件的路径
        Uri downloadFileUri = dManager.getUriForDownloadedFile(Long.parseLong(sp.getString("versionId","0")));
        Log.d("DownloadManager", "apk存储路径 : " + downloadFileUri);
        install.setDataAndType(downloadFileUri, "application/vnd.android.package-archive");
        if (downloadFileUri != null) {
            if ((Build.VERSION.SDK_INT >= 24)) {//判读版本是否在7.0以上
                install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                //添加这一句表示对目标应用临时授权该Uri所代表的文件
                //  不添加无法安装 或者出现解析包异常
            }
            context.startActivity(install);
        }



    }
    }