需求
- 使用DownloadManager实现Android应用自动更新功能
- 下载完成时自动跳转应用安装页面（Android7.0需要特殊适配）
- 处理安装App时动态权限
- 防重复下载处理
- 更新进度条百分比
代码
DownLoadManager下载处理及状态监听
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
String url = "http://shouji.360tpcdn.com/150527/c90d7a6a8cded5b5da95ae1ee6382875/com.tencent.mm_561.apk";
private DownloadManager downloadManager;
public static final String DOWNLOAD_ID = "download_id";
private long lastDownloadId = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//取消下载
findViewById(R.id.cancle_bt).setOnClickListener(this);
//查看下载状态
findViewById(R.id.look_bt).setOnClickListener(this);
//开始下载
findViewById(R.id.start_bt).setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.start_bt:
downLoadApp();
break;
case R.id.cancle_bt:
//取消下载， 如果一个下载被取消了，所有相关联的文件，部分下载的文件和完全下载的文件都会被删除。
downloadManager.remove(lastDownloadId);
break;
case R.id.look_bt:
Query query = new Query();
query.setFilterById(lastDownloadId);
Cursor cursor = downloadManager.query(query);
if (cursor == null) {
Toast.makeText(MainActivity.this, "Download not found!", Toast.LENGTH_LONG).show();
} else {
//以下是从游标中进行信息提取
cursor.moveToFirst();
String msg = statusMessage(cursor);
Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
}
break;
}
}
private void downLoadApp() {
final Request request = new Request(Uri.parse(url));
//下载网络需求 手机数据流量、wifi
request.setAllowedNetworkTypes(Request.NETWORK_MOBILE | Request.NETWORK_WIFI);
//设置是否允许漫游网络 建立请求 默认true
request.setAllowedOverRoaming(true);
//设置通知类型
setNotification(request);
//设置下载路径
setDownloadFilePath(request);
//设置可被媒体文件扫描到
request.allowScanningByMediaScanner();
/*如果我们希望下载的文件可以被系统的Downloads应用扫描到并管理，
我们需要调用Request对象的setVisibleInDownloadsUi方法，传递参数true。*/
request.setVisibleInDownloadsUi(true);
//设置请求的Mime
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
request.setMimeType(mimeTypeMap.getMimeTypeFromExtension(url));
//开始下载
downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
Query query = new Query();
query.setFilterById(lastDownloadId);
Cursor cursor = downloadManager.query(query);
if (!cursor.moveToFirst()) {// 没有记录
PermissionCompat.Builder builder = new PermissionCompat.Builder(this);
builder.addPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE});
builder.addPermissionRationale("say why need the permission");
builder.addRequestPermissionsCallBack(new OnRequestPermissionsCallBack() {
@Override
public void onGrant() {
lastDownloadId = downloadManager.enqueue(request);
}
@Override
public void onDenied(String permission) {
Log.e("update", permission + "Denied");
}
});
builder.build().request();
} else {
//以下是从游标中进行信息提取
cursor.moveToFirst();
String msg = statusMessage(cursor);
Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
}
}
/**
* 查询状态
*/
private String statusMessage(Cursor c) {
switch (c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS))) {
case DownloadManager.STATUS_FAILED:
return "Download failed";
case DownloadManager.STATUS_PAUSED:
return "Download paused";
case DownloadManager.STATUS_PENDING:
return "Download pending";
case DownloadManager.STATUS_RUNNING:
return "Download in progress!";
case DownloadManager.STATUS_SUCCESSFUL:
startActivity(new Intent(Settings.ACTION_APPLICATION_SETTINGS));
return "Download finished";
default:
return "Unknown Information";
}
}
/**
* 设置状态栏中显示Notification
*/
void setNotification(Request request) {
//设置Notification的标题
request.setTitle("纯纯写作");
//设置描述
request.setDescription("1.0.0");
//request.setNotificationVisibility( Request.VISIBILITY_VISIBLE ) ;
request.setNotificationVisibility(Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
//request.setNotificationVisibility( Request.VISIBILITY_VISIBLE_NOTIFY_ONLY_COMPLETION ) ;
//request.setNotificationVisibility( Request.VISIBILITY_HIDDEN ) ;
}
/**
* 设置下载文件存储目录
*/
void setDownloadFilePath(Request request) {
/**
* 方法1:
* 目录: Android -> data -> com.app -> files -> Download -> 微信.apk
* 这个文件是你的应用所专用的,软件卸载后，下载的文件将随着卸载全部被删除
*/
//request.setDestinationInExternalFilesDir( this , Environment.DIRECTORY_DOWNLOADS , "微信.apk" );
/**
* 方法2:
* 下载的文件存放地址 SD卡 download文件夹，pp.jpg
* 软件卸载后，下载的文件会保留
*/
//在SD卡上创建一个文件夹
//request.setDestinationInExternalPublicDir( "/mydownfile/" , "weixin.apk" ) ;
/**
* 方法3:
* 如果下载的文件希望被其他的应用共享
* 特别是那些你下载下来希望被Media Scanner扫描到的文件（比如音乐文件）
*/
//request.setDestinationInExternalPublicDir( Environment.DIRECTORY_MUSIC, "笨小孩.mp3" );
/**
* 方法4
* 文件将存放在外部存储的确实download文件内，如果无此文件夹，创建之，如果有，下面将返回false。
* 系统有个下载文件夹，比如小米手机系统下载文件夹 SD卡--> Download文件夹
*/
//创建目录
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).mkdir();
//设置文件存放路径
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "chunchunxiezuo.apk");
}
BroadcastReceiver下载完成监听广播进行安装
public class UpdataBroadcastReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "chunchunxiezuo.apk");
intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= 24) {
Uri apkUri = FileProvider.getUriForFile(context, "com.eminem.appupdatedemo.fileprovider", file);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
}
context.startActivity(intent);
}
}
使用开源库
项目GitHub
参考
DownLoadManager的使用
App下载更新android7.0适配
App下载更新进度条及android6.0适配
