使用Android自带的DownloadManager下载ApK并安装
柴岳
一、在 AndroidManifest.xml 中的准备
- 进行网络请求，需要申请
<uses-permission android:name="android.permission.INTERNET" />权限 - 安装 app ，需要申请
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />权限 - 读取手机设备，需要申请
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />和<uses-permission android:name="android.permission.READ_PHONE_STATE" />权限
4、注册一个 receiver 来监听下载完成和下载过程中点击通知栏的事件
<receiver android:name=".reciever.DownLoadManagerReceiver">
<intent-filter>
<!-- 配置 点击通知 和 下载完成 两个 action -->
<action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"/>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE"/>
</intent-filter>
</receiver>
二、DownLoadManager 下载功能
/**
* 使用 DownloaderManager 下载
*
* @param downloadUrl
* @param fileName
* @param mimetype
*/
public static void downLoadUrl(String downloadUrl, String fileName, String mimetype) {
// 创建下载请求
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(downloadUrl));
/*
* 设置在通知栏是否显示下载通知(下载进度), 有 3 个值可选:
* VISIBILITY_VISIBLE: 下载过程中可见, 下载完后自动消失 (默认)
* VISIBILITY_VISIBLE_NOTIFY_COMPLETED: 下载过程中和下载完成后均可见
* VISIBILITY_HIDDEN: 始终不显示通知
*/
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setVisibleInDownloadsUi(true);
// 设置通知的标题和描述
request.setTitle(fileName);
request.setDescription(fileName);
request.setMimeType(mimetype);
// 设置下载文件的保存位置
File saveFile = new File(Environment.getExternalStorageDirectory(), fileName);
request.setDestinationUri(Uri.fromFile(saveFile));
/*
* 2. 获取下载管理器服务的实例, 添加下载任务
*/
DownloadManager manager = (DownloadManager) SystemUtil.getAppContext().getSystemService(Context.DOWNLOAD_SERVICE);
// 将下载请求加入下载队列, 返回一个下载ID
long downloadId = manager.enqueue(request);
Log.d("Download", "downloadId=" + downloadId + "\tsaveFile=" + saveFile.getAbsolutePath());
}
三、下载完成监听
/**
* 检查下载状态，是否下载成功
*/
public static void checkStatus(Context context) {
DownloadManager manager = getDownLoadManager();
DownloadManager.Query query = new DownloadManager.Query();
// 执行查询, 返回一个 Cursor (相当于查询数据库)
Cursor cursor = manager.query(query);
if (!cursor.moveToFirst()) {
cursor.close();
}
int id = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_ID));
//通过下载的id查找
query.setFilterById(id);
// 获取下载好的 apk 路径
String localFilename = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
localFilename = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
} else {
localFilename = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
}
if (cursor.moveToFirst()) {
int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
switch (status) {
case DownloadManager.STATUS_PAUSED:
//下载暂停
break;
case DownloadManager.STATUS_PENDING:
//下载延迟
break;
case DownloadManager.STATUS_RUNNING:
//正在下载
break;
case DownloadManager.STATUS_SUCCESSFUL:
Log.d("Download", "localFilename:" + localFilename);
//下载完成安装APK
installApp(context, localFilename);
cursor.close();
break;
case DownloadManager.STATUS_FAILED:
//下载失败
cursor.close();
break;
default:
break;
}
}
}
自定义DownLoadManagerReceiver，实现监听
public class DownLoadManagerReceiver extends BootBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(action)) {
Log.d("Download", "用户点击了通知");
// 点击下载进度通知时, 对应的下载ID以数组的方式传递
long[] ids = intent.getLongArrayExtra(DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS);
Log.d("Download", "ids: " + Arrays.toString(ids));
long completeDownloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1L);
Log.d("Download", "id: " + completeDownloadId);
//这里可以做暂停下载功能
} else if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
Log.d("Download", "下载完成");
DownLoadUtil.checkStatus(context);
}
}
}
四、调起apk安装
/**
* 安装apk
*
* @param context
* @param path
*/
private static void installApp(Context context, String path) {
Log.d("Download", "installApp: StorageState = " + Environment.getExternalStorageState());
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
// Uri.parse(path).getPath()去除 file://
File targetFile = new File(Uri.parse(path).getPath());
Log.i("Download", "targetFile: " + targetFile.getPath() + "\ttargetFile = " + targetFile.getAbsolutePath() + "\ttargetFile 是否存在:" + targetFile.exists());
if (targetFile.exists()) {//先判断文件是否已存在
Log.i("Download", "targetFile: ---" + targetFile.getPath());
//1. 创建 Intent 并设置 action
Intent intent = new Intent(Intent.ACTION_VIEW);
//2. 设置 category
intent.addCategory(Intent.CATEGORY_DEFAULT);
Uri uri = FileProvider.getUriForFile(context, context.getPackageName() + ".fileprovider", targetFile);
//添加 flag ,不记得在哪里看到的，说是解决：有些机器上不能成功跳转的问题
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.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
//3. 设置 data 和 type
intent.setDataAndType(uri, "application/vnd.android.package-archive");
//3. 设置 data 和 type (效果和上面一样)
//intent.setDataAndType(Uri.fromFile(targetFile),"application/vnd.android.package-archive");
//intent.setDataAndType(Uri.parse("file://" + targetFile.getPath()),"application/vnd.android.package-archive");
//4. 启动 activity
context.startActivity(intent);
}
}
}
至此从下载 Apk 到下载完成后自动调起安装就完成了
这里有个小 tip：
可以通过下载的路径，获取到 ApkInfo，得到对应的包信息
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