Sample code for Android to install and uninstall another app in one app
- 2021-12-11 19:00:19
- OfStack
Android installs and uninstalls another app in one app
1. Create a new folder asserts under app → src → main, and place the apk file to be installed in asserts
2. Create a new folder xml under app → src → main → res, right-click the folder xml, and select new → XML ES22File and File name as file names, which are optional. In this article, it is filepaths; Root element is the resource type, enter paths, determine and edit the following code:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
3. Editing AndroidManifest. xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.myapplication">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:requestLegacyExternalStorage="true"
android:theme="@style/Theme.MyApplication">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities=" Package name "
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/filepaths Steps 2 Files in "
/>
</provider>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
4.MainActivity.java
public class MainActivity extends AppCompatActivity {
Context mContext;
private Button bt,bt0;
private TextView tx;
public static boolean isGrantExternalRW(Activity activity) {
// Authority determination
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && activity.checkSelfPermission(
Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
activity.requestPermissions(new String[]{
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
}, 1);
return false;
}
return true;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this;
tx=findViewById(R.id.text);
bt=findViewById(R.id.button);// Installation
bt0=findViewById(R.id.button0);// Uninstall
// Toast.makeText(this, ""+Environment.getExternalStorageDirectory().getAbsolutePath(), 0).show();
if(!this.isGrantExternalRW(MainActivity.this)){return;}// It is important to determine whether you have permission to modify
else{
if(copyApkFromAssets(this, "app-debug.apk", Environment.getExternalStorageDirectory().getAbsolutePath()+"/app-debug.apk")){
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new AlertDialog.Builder(mContext)
.setIcon(R.drawable.ic_launcher)
.setMessage(" Do you want to install it? ")
.setPositiveButton("yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// intent.setDataAndType(Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath()+"/app-debug.apk"),
// "application/vnd.android.package-archive");
File apkFile = new File(Environment.getExternalStorageDirectory()+"/app-debug.apk");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri uri = FileProvider.getUriForFile(MainActivity.this, "com.example.myapplication", apkFile);
intent.setDataAndType(uri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
}
mContext.startActivity(intent);
}
}).show();
}
});
bt0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Uri packageURI = Uri.parse("package:com.example.a22");//package:+ The name of the package you want to uninstall
Intent intent =new Intent(Intent.ACTION_DELETE);
intent.setData(packageURI);
mContext.startActivity(intent);
}
});
}
}}
public boolean copyApkFromAssets(Context context, String fileName, String path) {
// Will asserts In apk Copy the file to the mobile phone storage
// It can be drawn from the mobile phone storage to the bottom, which is a separate file without setting a folder
boolean copyIsFinish = false;
try {
InputStream is = context.getAssets().open(fileName);
File file = new File(path);
file.createNewFile();
FileOutputStream fos = new FileOutputStream(file);
int length = is.available();
byte[] temp = new byte[length];
int i = 0;
while ((i = is.read(temp)) > 0) {
fos.write(temp, 0, i);
}
fos.close();
is.close();
copyIsFinish = true;
} catch (IOException e) {
e.printStackTrace();
}
return copyIsFinish;
}
}
The tutorial on the network has a lot of self-contradictory, I prevent authority error, can add the authority set 1 time, free can choose to test 1, should have can be deleted