问题描述
我试图以编程方式在没有提示的情况下安装应用程序.意味着在安装应用程序时不会显示弹出窗口，用户无需在其中按安装选项.我遵循了这的答案.但是每当我运行代码时，它都会引发错误
I am trying to install the application programatically without prompt. Means, installing the app without showing the pop-up where user has to press install option.I followed THIS answer.But whenever I am running the code, it is throwing the error
由以下原因引起:java.io.IOException:权限被拒绝 在java.lang.ProcessManager.exec(本地方法) 在java.lang.ProcessManager.exec(ProcessManager.java:209)
Caused by: java.io.IOException: Permission denied at java.lang.ProcessManager.exec(Native Method) at java.lang.ProcessManager.exec(ProcessManager.java:209)
它说权限被拒绝"，但不告诉是哪个权限.该apk位于设备的存储中，并且我已在清单中提供了以下权限.
It says Permission denied, but doesn't tell which permission. The apk is in the storage of the device and I have provided following permissions in the manifest.
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
以下是我用于安装apk的代码
Following is the code that I use for installing the apk
public void InstallAPK(String filename){
File file = new File(filename);
if(file.exists()){
try {
String command;
command = "adb install -r " + filename;
Process proc = Runtime.getRuntime().exec(new String[] { "su", "-c", command });
proc.waitFor();
} catch (Exception e) {
e.printStackTrace();
}
}
}
我将此函数称为:
InstallAPK(Environment.getExternalStorageDirectory().getAbsolutePath()+"/update.apk");
有人可以请我帮忙吗?
推荐答案
您正在做的问题是，为了获得INSTALL_PACKAGES权限，您的应用程序必须位于/system/priv-app文件夹中.如果您的应用程序不在该文件夹中，则不会授予您权限，并且您的应用程序将失败.
The problem with what you are doing is that in order to get the INSTALL_PACKAGES permission your application has to be in the /system/priv-app folder. If your application is not in that folder then you will not be granted the permission and your application will fail.
另一种以编程方式安装应用程序而无需提示您具有root用户访问权限的方式如下:
Another way to install an app programatically without prompts assuming you have root access would be as follows:
首先，您必须将此权限添加到您的android清单中. <uses-permission android:name="android.permission.INSTALL_PACKAGES" /> Android Studio可能会抱怨这是系统权限，不会被授予.不用担心，由于您的应用程序将被安装到/system/priv-app文件夹中，因此它将获得该系统的唯一许可.
First you must add this permission to your android manifest. <uses-permission android:name="android.permission.INSTALL_PACKAGES" /> Android studio may complain that this is a system permission and won't be granted. Don't worry, since your app is going to be installed to the /system/priv-app folder, it will get this system only permission.
添加权限后，您可以使用以下静态方法来安装软件包.您需要做的就是提供一个String网址，该网址可用于访问该文件，并Context和该应用程序将被安装.
After adding permission you can use the following static method to install packages. All you need to do is provide a url as a String that can be used to access the file, and a Context and the application will be installed.
public static boolean installPackage(final Context context, final String url)
throws IOException {
//Use an async task to run the install package method
AsyncTask<Void,Void,Void> task = new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... voids) {
try {
PackageInstaller packageInstaller = context.getPackageManager().getPackageInstaller();
PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(
PackageInstaller.SessionParams.MODE_FULL_INSTALL);
// set params
int sessionId = packageInstaller.createSession(params);
PackageInstaller.Session session = packageInstaller.openSession(sessionId);
OutputStream out = session.openWrite("COSU", 0, -1);
//get the input stream from the url
HttpsURLConnection apkConn = (HttpsURLConnection) new URL(url).openConnection();
InputStream in = apkConn.getInputStream();
byte[] buffer = new byte[65536];
int c;
while ((c = in.read(buffer)) != -1) {
out.write(buffer, 0, c);
}
session.fsync(out);
in.close();
out.close();
//you can replace this intent with whatever intent you want to be run when the applicaiton is finished installing
//I assume you have an activity called InstallComplete
Intent intent = new Intent(context, InstallComplete.class);
intent.putExtra("info", "somedata"); // for extra data if needed..
Random generator = new Random();
PendingIntent i = PendingIntent.getActivity(context, generator.nextInt(), intent, PendingIntent.FLAG_UPDATE_CURRENT);
session.commit(i.getIntentSender());
} catch (Exception ex){
Log.e("AppStore","Error when installing application. Error is " + ex.getMessage());
}
return null;
}
};
task.execute(null,null);
return true;
}
注意:即使安装程序应用程序位于system/priv-app中，如果安装失败，则请确保已使用发布密钥对应用程序进行了签名.有时使用调试密钥签名将阻止授予Install_Packages权限
Note: If the installation fails even though the installer app is located in system/priv-app then ensure that you have signed the app with a release key. Sometimes signing with a debug key will prevent the Install_Packages permission from being granted
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