Android 权限请求总是被拒绝
Android permission request always denied
我正在 Android Studio 中使用 Java 构建一个 Android 应用程序,需要蓝牙权限才能运行。
我的问题是,每次我请求所需的权限时,我的请求都会被自动拒绝。此外,发出请求后没有出现权限对话框。
我请求的权限是 BLUETOOTH_ADVERTISE
、BLUETOOTH_CONNECT
、BLUETOOTH
。
这是清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp">
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-feature
android:name="android.hardware.bluetooth_le"
android:required="true" />
<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/Theme.MyApp">
<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>
这是 build.gradle
文件。我不知道它是否重要,但我包含它只是为了确定。
plugins {
id 'com.android.application'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.myapp"
minSdk 23
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),
'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation "androidx.fragment:fragment:1.4.0"
implementation "androidx.activity:activity:1.4.0"
testImplementation 'junit:junit:'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
这里是检查和请求许可的代码:
/*
Returns true if all the permissions are already granted.
Returns false if there are missing permissions.
*/
@RequiresApi(api = Build.VERSION_CODES.S)
private boolean checkPermissions() {
System.out.println("Checking permissions");
ArrayList<String> permissions = new ArrayList<>();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADVERTISE)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_ADVERTISE);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_CONNECT);
}
if (permissions.size() != 0) {
System.out.println("Missing the following permissions: " + permissions.toString());
requestPermissionLauncher.launch(permissions.toArray(new String[0]));
//ActivityCompat.requestPermissions(MainActivity.this, permissions.toArray(new String[0]), 0);
return false;
}
return true;
}
这是应该请求权限的请求权限启动器:
@RequiresApi(api = Build.VERSION_CODES.S)
private final ActivityResultLauncher<String[]> requestPermissionLauncher =
registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), results -> {
// Ensure all permissions have been granted
boolean isGranted = true;
for (boolean entry : results.values()) {
if (!entry) {
isGranted = false;
break;
}
}
if (isGranted) {
Toast.makeText(getApplicationContext(), "Permissions Granted", Toast.LENGTH_SHORT).show();
System.out.println("Permission granted");
} else {
Toast.makeText(getApplicationContext(), "Permissions Denied", Toast.LENGTH_SHORT).show();
System.out.println("Permission denied");
Toast.makeText(this, "You need to grant all permissions to use this application", Toast.LENGTH_LONG).show();
}
});
几天来我一直在努力寻找解决方案,但没有成功。我读过有关即时应用程序无法访问确定权限的信息,但我不认为这是我的情况:我不是在构建即时应用程序。
这个问题可能与我的 Android 设备和 API 版本有关吗?我的设备是 Samsung Galaxy A5 2017 运行 Android 版本 8.0.0 (Oreo)。
感谢您的宝贵时间。
这个问题是我的一个愚蠢的错误。我使用的权限在我的测试 Android 设备上不可用。
我通过使用 BLUETOOTH_ADMIN
权限而不是 BLUETOOTH_ADVERTISE
和 BLUETOOTH_CONNECT
.
解决了这个问题
我正在 Android Studio 中使用 Java 构建一个 Android 应用程序,需要蓝牙权限才能运行。
我的问题是,每次我请求所需的权限时,我的请求都会被自动拒绝。此外,发出请求后没有出现权限对话框。
我请求的权限是 BLUETOOTH_ADVERTISE
、BLUETOOTH_CONNECT
、BLUETOOTH
。
这是清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp">
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-feature
android:name="android.hardware.bluetooth_le"
android:required="true" />
<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/Theme.MyApp">
<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>
这是 build.gradle
文件。我不知道它是否重要,但我包含它只是为了确定。
plugins {
id 'com.android.application'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.myapp"
minSdk 23
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),
'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation "androidx.fragment:fragment:1.4.0"
implementation "androidx.activity:activity:1.4.0"
testImplementation 'junit:junit:'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
这里是检查和请求许可的代码:
/*
Returns true if all the permissions are already granted.
Returns false if there are missing permissions.
*/
@RequiresApi(api = Build.VERSION_CODES.S)
private boolean checkPermissions() {
System.out.println("Checking permissions");
ArrayList<String> permissions = new ArrayList<>();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADVERTISE)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_ADVERTISE);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_CONNECT);
}
if (permissions.size() != 0) {
System.out.println("Missing the following permissions: " + permissions.toString());
requestPermissionLauncher.launch(permissions.toArray(new String[0]));
//ActivityCompat.requestPermissions(MainActivity.this, permissions.toArray(new String[0]), 0);
return false;
}
return true;
}
这是应该请求权限的请求权限启动器:
@RequiresApi(api = Build.VERSION_CODES.S)
private final ActivityResultLauncher<String[]> requestPermissionLauncher =
registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), results -> {
// Ensure all permissions have been granted
boolean isGranted = true;
for (boolean entry : results.values()) {
if (!entry) {
isGranted = false;
break;
}
}
if (isGranted) {
Toast.makeText(getApplicationContext(), "Permissions Granted", Toast.LENGTH_SHORT).show();
System.out.println("Permission granted");
} else {
Toast.makeText(getApplicationContext(), "Permissions Denied", Toast.LENGTH_SHORT).show();
System.out.println("Permission denied");
Toast.makeText(this, "You need to grant all permissions to use this application", Toast.LENGTH_LONG).show();
}
});
几天来我一直在努力寻找解决方案,但没有成功。我读过有关即时应用程序无法访问确定权限的信息,但我不认为这是我的情况:我不是在构建即时应用程序。
这个问题可能与我的 Android 设备和 API 版本有关吗?我的设备是 Samsung Galaxy A5 2017 运行 Android 版本 8.0.0 (Oreo)。
感谢您的宝贵时间。
这个问题是我的一个愚蠢的错误。我使用的权限在我的测试 Android 设备上不可用。
我通过使用 BLUETOOTH_ADMIN
权限而不是 BLUETOOTH_ADVERTISE
和 BLUETOOTH_CONNECT
.