Android自动更新（支持7.0）

package com.example.chenfengyao.installapkdemo; import android.app.DownloadManager; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.database.Cursor; import android.net.Uri; import android.os.Binder; import android.os.Environment; import android.os.IBinder; import android.support.annotation.Nullable; import android.util.Log; import android.util.LongSparseArray; import com.example.chenfengyao.installapkdemo.utils.IOUtils; import com.example.chenfengyao.installapkdemo.utils.InstallUtil; import com.example.chenfengyao.installapkdemo.utils.SystemManager; import java.io.File; /** * If there is no bug, then it is created by ChenFengYao on 2017/4/20, * otherwise, I do not know who create it either. */ public class DownloadService extends Service { private DownloadManager mDownloadManager; private DownloadBinder mBinder = new DownloadBinder(); private LongSparseArray<String> mApkPaths; private DownloadFinishReceiver mReceiver; @Override public void onCreate() { super.onCreate(); mDownloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); mApkPaths = new LongSparseArray<>(); //注册下载完成的广播 mReceiver = new DownloadFinishReceiver(); registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)); } @Nullable @Override public IBinder onBind(Intent intent) { return mBinder; } @Override public void onDestroy() { unregisterReceiver(mReceiver);//取消注册广播接收者 super.onDestroy(); } public class DownloadBinder extends Binder{ /** * 下载 * @param apkUrl 下载的url */ public long startDownload(String apkUrl){ //点击下载 //删除原有的APK IOUtils.clearApk(DownloadService.this,"test.apk"); //使用DownLoadManager来下载 DownloadManager.Request request = new DownloadManager.Request(Uri.parse(apkUrl)); //将文件下载到自己的Download文件夹下,必须是External的 //这是DownloadManager的限制 File file = new File(getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), "test.apk"); request.setDestinationUri(Uri.fromFile(file)); //添加请求 开始下载 long downloadId = mDownloadManager.enqueue(request); Log.d("DownloadBinder", file.getAbsolutePath()); mApkPaths.put(downloadId,file.getAbsolutePath()); return downloadId; } /** * 获取进度信息 * @param downloadId 要获取下载的id * @return 进度信息 max-100 */ public int getProgress(long downloadId) { //查询进度 DownloadManager.Query query = new DownloadManager.Query() .setFilterById(downloadId); Cursor cursor = null; int progress = 0; try { cursor = mDownloadManager.query(query);//获得游标 if (cursor != null && cursor.moveToFirst()) { //当前的下载量 int downloadSoFar = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)); //文件总大小 int totalBytes = cursor.getInt(cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)); progress = (int) (downloadSoFar * 1.0f / totalBytes * 100); } } finally { if (cursor != null) { cursor.close(); } } return progress; } } //下载完成的广播 private class DownloadFinishReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { //下载完成的广播接收者 long completeDownloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1); String apkPath = mApkPaths.get(completeDownloadId); Log.d("DownloadFinishReceiver", apkPath); if (!apkPath.isEmpty()){ SystemManager.setPermission(apkPath);//提升读写权限,否则可能出现解析异常 InstallUtil.install(context,apkPath); }else { Log.e("DownloadFinishReceiver", "apkPath is null"); } } } }