public class AppDownloadManager {
public static final String TAG = "AppDownloadManager";
private WeakReference<Activity> weakReference;
private DownloadManager mDownloadManager;
private DownloadChangeObserver mDownLoadChangeObserver;
private DownloadReceiver mDownloadReceiver;
private long mReqId;
private OnUpdateListener mUpdateListener;
public AppDownloadManager(Activity activity) {
weakReference = new WeakReference<Activity>(activity);
mDownloadManager = (DownloadManager) weakReference.get().getSystemService(Context.DOWNLOAD_SERVICE);
mDownLoadChangeObserver = new DownloadChangeObserver(new Handler());
mDownloadReceiver = new DownloadReceiver();
}
public void setUpdateListener(OnUpdateListener mUpdateListener) {
this.mUpdateListener = mUpdateListener;
}
public void downloadApk(String apkUrl, String title, String desc) {
// fix bug : 装不了新版本，在下载之前应该删除已有文件
File apkFile = new File(weakReference.get().getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), "app_name.apk");
if (apkFile != null && apkFile.exists()) {
apkFile.delete();
}
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(apkUrl));
//设置title
request.setTitle(title);
// 设置描述
request.setDescription(desc);
// 完成后显示通知栏
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalFilesDir(weakReference.get(), Environment.DIRECTORY_DOWNLOADS, "app_name.apk");
//在手机SD卡上创建一个download文件夹
// Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).mkdir() ;
//指定下载到SD卡的/download/my/目录下
// request.setDestinationInExternalPublicDir("/codoon/","codoon_health.apk");
request.setMimeType("application/vnd.android.package-archive");
//
mReqId = mDownloadManager.enqueue(request);
}
/**
* 取消下载
*/
public void cancel() {
mDownloadManager.remove(mReqId);
}
/**
* 对应 {@link Activity }
*/
public void resume() {
//设置监听Uri.parse("content://downloads/my_downloads")
weakReference.get().getContentResolver().registerContentObserver(Uri.parse("content://downloads/my_downloads"), true,
mDownLoadChangeObserver);
// 注册广播，监听APK是否下载完成
weakReference.get().registerReceiver(mDownloadReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
/**
* 对应{@link Activity#onPause()} ()}
*/
public void onPause() {
weakReference.get().getContentResolver().unregisterContentObserver(mDownLoadChangeObserver);
weakReference.get().unregisterReceiver(mDownloadReceiver);
}
private void updateView() {
int[] bytesAndStatus = new int[]{0, 0, 0};
DownloadManager.Query query = new DownloadManager.Query().setFilterById(mReqId);
Cursor c = null;
try {
c = mDownloadManager.query(query);
if (c != null && c.moveToFirst()) {
//已经下载的字节数
bytesAndStatus[0] = c.getInt(c.getColumnIndexOrThrow(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
//总需下载的字节数
bytesAndStatus[1] = c.getInt(c.getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
//状态所在的列索引
bytesAndStatus[2] = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
}
} finally {
if (c != null) {
c.close();
}
}
if (mUpdateListener != null) {
mUpdateListener.update(bytesAndStatus[0], bytesAndStatus[1]);
}
Log.i(TAG, "下载进度：" + bytesAndStatus[0] + "/" + bytesAndStatus[1] + "");
}
class DownloadChangeObserver extends ContentObserver {
/**
* Creates a content observer.
*
* @param handler The handler to run {@link #onChange} on, or null if none.
*/
public DownloadChangeObserver(Handler handler) {
super(handler);
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
updateView();
}
}
class DownloadReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, final Intent intent) {
boolean haveInstallPermission;
// 兼容Android 8.0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//先获取是否有安装未知来源应用的权限
haveInstallPermission = context.getPackageManager().canRequestPackageInstalls();
if (!haveInstallPermission) {//没有权限
// 弹窗，并去设置页面授权
final AndroidOInstallPermissionListener listener = new AndroidOInstallPermissionListener() {
@Override
public void permissionSuccess() {
installApk(context, intent);
}
@Override
public void permissionFail() {
ToastUtils.shortToast(context, "授权失败，无法安装应用");
}
};
AndroidOPermissionActivity.sListener = listener;
Intent intent1 = new Intent(context, AndroidOPermissionActivity.class);
context.startActivity(intent1);
} else {
installApk(context, intent);
}
} else {
installApk(context, intent);
}
}
}
/**
* @param context
* @param intent
*/
private void installApk(Context context, Intent intent) {
long completeDownLoadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
Logger.e(TAG, "收到广播");
Uri uri;
Intent intentInstall = new Intent();
intentInstall.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intentInstall.setAction(Intent.ACTION_VIEW);
if (completeDownLoadId == mReqId) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) { // 6.0以下
uri = mDownloadManager.getUriForDownloadedFile(completeDownLoadId);
} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) { // 6.0 - 7.0
File apkFile = queryDownloadedApk(context, completeDownLoadId);
uri = Uri.fromFile(apkFile);
} else { // Android 7.0 以上
uri = FileProvider.getUriForFile(context,
"package_name.fileProvider",
new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), "app_name.apk"));
intentInstall.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
// 安装应用
Logger.e("zhouwei", "下载完成了");
intentInstall.setDataAndType(uri, "application/vnd.android.package-archive");
context.startActivity(intentInstall);
}
}
//通过downLoadId查询下载的apk，解决6.0以后安装的问题
public static File queryDownloadedApk(Context context, long downloadId) {
File targetApkFile = null;
DownloadManager downloader = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
if (downloadId != -1) {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadId);
query.setFilterByStatus(DownloadManager.STATUS_SUCCESSFUL);
Cursor cur = downloader.query(query);
if (cur != null) {
if (cur.moveToFirst()) {
String uriString = cur.getString(cur.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
if (!TextUtils.isEmpty(uriString)) {
targetApkFile = new File(Uri.parse(uriString).getPath());
}
}
cur.close();
}
}
return targetApkFile;
}
public interface OnUpdateListener {
void update(int currentByte, int totalByte);
}
public interface AndroidOInstallPermissionListener {
void permissionSuccess();
void permissionFail();
}
}
调用方法
private void showUpdateDialog(final AppUpdateInfo updateInfo) {
AppUpdateDialog dialog = new AppUpdateDialog(getContext());
dialog.setAppUpdateInfo(updateInfo);
dialog.setOnUpdateClickListener(new AppUpdateDialog.OnUpdateClickListener() {
@Override
public void update(final AppUpdateDialog updateDialog) {
String title = "app name";
String desc = "版本更新";
mDownloadManager.setUpdateListener(new AppDownloadManager.OnUpdateListener() {
@Override
public void update(int currentByte, int totalByte) {
updateDialog.setProgress(currentByte, totalByte);
if ((currentByte == totalByte) && totalByte != 0) {
updateDialog.dismiss();
}
}
});
mDownloadManager.downloadApk(updateInfo.download_url, title, desc);
}
});
dialog.setCanceledOnTouchOutside(false);
dialog.setCancelable(false);
dialog.show();
}
注意在 onResume 和 onPause 调用对应方法：
@Override
public void onResume() {
super.onResume();
if (mDownloadManager != null) {
mDownloadManager.resume();
}
}
@Override
public void onPause() {
super.onPause();
if (mDownloadManager != null) {
mDownloadManager.onPause();
}
}
转载链接：
https://www.jianshu.com/p/85913ed97af5