`android.permission.BLUETOOTH_PRIVILEGED` is a reserved permission
时间: 2023-12-09 17:05:30 浏览: 44
in Android. What is its purpose and why is it reserved?
The `android.permission.BLUETOOTH_PRIVILEGED` permission is reserved for system components that need access to the Bluetooth stack. This permission grants privileged access to the Bluetooth hardware, allowing the component to perform operations such as pairing, bonding, and creating a Bluetooth socket. It is reserved to prevent malicious apps from gaining unauthorized access to the Bluetooth hardware and potentially compromising the device's security. Additionally, this permission is only granted to system components as it's not appropriate to grant it to third-party apps due to its privileged nature.
相关问题
android.permission.READ_PRECISE_PHONE_STATE
android.permission.READ_PRECISE_PHONE_STATE是一个权限,用于允许应用程序读取精确的电话状态。具体来说,它允许应用程序访问以下两个方法:
1. getSubscriberId():获取设备的唯一标识符,也称为IMSI(国际移动用户识别码)。它返回一个字符串,表示SIM卡的唯一标识符。
2. getVoiceMailAlphaTag():获取语音信箱的标签。它返回一个字符串,表示语音信箱的名称。
以下是一个演示如何使用android.permission.READ_PRECISE_PHONE_STATE权限的示例代码:
```java
// 检查是否有READ_PRECISE_PHONE_STATE权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PRECISE_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
// 有权限,可以执行相关操作
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String subscriberId = telephonyManager.getSubscriberId();
String voiceMailAlphaTag = telephonyManager.getVoiceMailAlphaTag();
// 在这里处理subscriberId和voiceMailAlphaTag的值
} else {
// 没有权限,需要请求权限
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PRECISE_PHONE_STATE}, REQUEST_CODE);
}
```
请注意,为了使用android.permission.READ_PRECISE_PHONE_STATE权限,您需要在AndroidManifest.xml文件中添加以下权限声明:
```xml
<uses-permission android:name="android.permission.READ_PRECISE_PHONE_STATE" />
```
flutter compat added android.permission.WRITE_EXTERNAL_STORAGE android.permission.READ_PHONE_STATE解决实例
为了在Flutter应用中使用WRITE_EXTERNAL_STORAGE和READ_PHONE_STATE权限,需要在AndroidManifest.xml文件中添加以下代码:
```
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
```
然后,在您的Flutter项目中的android/app/build.gradle文件中添加以下依赖项:
```
dependencies {
implementation 'com.android.support:support-compat:28.0.0'
}
```
最后,在您的Flutter项目中的MainActivity.java文件中添加以下代码:
```
import android.os.Bundle;
import io.flutter.app.FlutterActivity;
import io.flutter.plugins.GeneratedPluginRegistrant;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.pm.PackageManager;
public class MainActivity extends FlutterActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GeneratedPluginRegistrant.registerWith(this);
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE}, 2);
}
}
}
```
这个代码片段将检查WRITE_EXTERNAL_STORAGE和READ_PHONE_STATE权限是否被授予,并提供请求这些权限的选项。当用户授权这些权限后,您的应用程序就可以使用这些权限了。