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Проблема с разрешениями в программах на Android
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<?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="kz.talipovsn.permissions"> | |
<uses-permission android:name="android.permission.INTERNET" /> | |
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/> | |
<uses-permission android:name="android.permission.READ_MEDIA_AUDIO"/> | |
<uses-permission android:name="android.permission.READ_MEDIA_VIDEO"/> | |
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> | |
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" | |
tools:ignore="ScopedStorage" /> | |
<application | |
android:allowBackup="true" | |
android:icon="@mipmap/ic_launcher" | |
android:label="@string/app_name" | |
android:roundIcon="@mipmap/ic_launcher_round" | |
android:supportsRtl="true" | |
android:theme="@style/AppTheme" | |
android:requestLegacyExternalStorage="true" | |
android:preserveLegacyExternalStorage="true" | |
android:usesCleartextTraffic="true" | |
tools:targetApi="r"> | |
<activity android:name=".MainActivity" | |
android:exported="true"> | |
<intent-filter> | |
<action android:name="android.intent.action.MAIN" /> | |
<category android:name="android.intent.category.LAUNCHER" /> | |
</intent-filter> | |
</activity> | |
</application> | |
</manifest> |
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apply plugin: 'com.android.application' | |
android { | |
compileSdkVersion 33 | |
defaultConfig { | |
applicationId "kz.talipovsn.permissions" | |
minSdkVersion 21 | |
targetSdkVersion 33 | |
versionCode 1 | |
versionName "1.0" | |
} | |
buildTypes { | |
release { | |
minifyEnabled false | |
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' | |
} | |
} | |
} | |
dependencies { | |
implementation 'com.google.android.material:material:1.8.0' | |
implementation 'org.apache.commons:commons-text:1.10.0' | |
implementation 'androidx.appcompat:appcompat:1.6.0' | |
implementation 'androidx.constraintlayout:constraintlayout:2.1.4' | |
implementation 'androidx.appcompat:appcompat:1.6.0' | |
implementation 'com.google.android.material:material:1.8.0' | |
implementation 'androidx.constraintlayout:constraintlayout:2.1.4' | |
implementation 'androidx.navigation:navigation-fragment:2.5.3' | |
implementation 'androidx.navigation:navigation-ui:2.5.3' | |
} |
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package kz.talipovsn.permissions; | |
import android.Manifest; | |
import android.app.DownloadManager; | |
import android.content.Context; | |
import android.content.pm.PackageManager; | |
import android.net.Uri; | |
import android.os.Build; | |
import android.os.Environment; | |
import androidx.annotation.RequiresApi; | |
import androidx.core.app.ActivityCompat; | |
import androidx.appcompat.app.AppCompatActivity; | |
import android.os.Bundle; | |
import android.view.View; | |
import android.webkit.URLUtil; | |
import android.widget.Button; | |
import android.widget.Toast; | |
public class MainActivity extends AppCompatActivity { | |
final String PSU_URL = "https://tou.edu.kz/images/links/gos_vestnik.png"; // Картинка для загрузки | |
final int RCODE_LOADING = 1; // Константа для идентификации запроса разрешений | |
String currentURL; // Переменная с URL-адресом загружаемой картинки | |
private Button button; | |
@Override | |
protected void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
setContentView(R.layout.activity_main); | |
button = findViewById(R.id.button); | |
// Обработчик кнопки загрузки картинки | |
button.setOnClickListener(new View.OnClickListener() { | |
@Override | |
public void onClick(View v) { | |
currentURL = PSU_URL; | |
saveImage(currentURL); | |
} | |
}); | |
} | |
//------------------------------------------------------- | |
// Проверка наличия конкретного разрешения у программы | |
public static boolean hasPermission(Context context, String permission) { | |
int res = context.checkCallingOrSelfPermission(permission); | |
return res == PackageManager.PERMISSION_GRANTED; | |
} | |
// Проверка наличия списка разрешений у программы | |
public static boolean hasPermissionsList(Context context, String[] permissions) { | |
boolean hasAllPermissions = true; | |
for (String permission : permissions) { | |
if (!hasPermission(context, permission)) { | |
hasAllPermissions = false; | |
break; | |
} | |
} | |
return hasAllPermissions; | |
} | |
// Нужные разрешения для старых версий Android | |
public static String[] storge_permissions = { | |
Manifest.permission.WRITE_EXTERNAL_STORAGE, | |
Manifest.permission.READ_EXTERNAL_STORAGE | |
}; | |
// Нужные разрешения для Android 33 | |
@RequiresApi(api = Build.VERSION_CODES.TIRAMISU) | |
public static String[] storge_permissions_33 = { | |
Manifest.permission.READ_MEDIA_IMAGES, | |
Manifest.permission.READ_MEDIA_AUDIO, | |
Manifest.permission.READ_MEDIA_VIDEO | |
}; | |
// Определяем перечень нужных разрешений для текущей версии Android | |
public static String[] permissions() { | |
String[] p; | |
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { | |
p = storge_permissions_33; | |
} else { | |
p = storge_permissions; | |
} | |
return p; | |
} | |
//------------------------------------------------------- | |
// Вызывается сразу после установки разрешения | |
@Override | |
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { | |
super.onRequestPermissionsResult(requestCode, permissions, grantResults); | |
// Если вызывается наш запрос на разрешения | |
if (requestCode == RCODE_LOADING) { | |
// Если разрешения даны, то сохранить картинку | |
if (hasPermissionsList(this, permissions())) { | |
saveImage(currentURL); | |
} | |
} | |
} | |
// Сохранение картинки с заданного адреса URL | |
private void saveImage(String url) { | |
try { | |
// Проверяем, есть ли нужные разрешения, если нет то выдаем окно запроса с выходом из этого метода | |
if (!hasPermissionsList(this, permissions())) { | |
ActivityCompat.requestPermissions(this, permissions(), RCODE_LOADING); | |
return; | |
} | |
// Если адрес нормальный, то загружаем картинку | |
if (URLUtil.isValidUrl(url)) { | |
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url)); | |
request.allowScanningByMediaScanner(); | |
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); | |
request.setDestinationInExternalPublicDir( | |
Environment.DIRECTORY_PICTURES, Uri.parse(url).getLastPathSegment()); | |
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); | |
downloadManager.enqueue(request); | |
Toast.makeText(MainActivity.this, R.string.loaded, Toast.LENGTH_LONG).show(); | |
} else { | |
Toast.makeText(MainActivity.this, R.string.error, Toast.LENGTH_LONG).show(); | |
} | |
} catch (Exception e) { | |
Toast.makeText(MainActivity.this, R.string.error, Toast.LENGTH_LONG).show(); | |
} | |
} | |
} |
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