Android(安卓)打开系统蓝牙设置
16lz
2022-05-31
判断蓝牙是否开启
public static boolean isBluetoothEnable() { BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); return bluetoothAdapter.isEnabled();}AndroidManifest文件中添加权限：
<uses-permission android:name="android.permission.BLUETOOTH" />打开蓝牙设置
private int openSetting(String setting){ Intent intent = new Intent(); intent.setAction(Settings.ACTION_BLUETOOTH_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); try{ startActivity(intent); } catch(ActivityNotFoundException ex){ ex.printStackTrace(); }catch (Exception e){ e.printStackTrace(); }}此时发现并不能打开蓝牙设置界面，报错如下：
java.lang.SecurityException: Permission Denial: starting Intent { act=android.settings.BLUETOOTH_SETTINGS flg=0x10000000 cmp=com.android.settings/.Settings$BluetoothSettingsActivity } from ProcessRecord{4444b4b0 31323:org.zywx.wbpalmstar.widgetone.uexdevice/u0a1149} (pid=31323, uid=11149) requires android.permission.BLUETOOTH_ADMIN at android.os.Parcel.readException(Parcel.java:1472) at android.os.Parcel.readException(Parcel.java:1426) at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2317) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1437) at android.app.Activity.startActivityForResult(Activity.java:3479) at android.app.Activity.startActivityForResult(Activity.java:3440)由log可知，权限被拒绝，但是没说是缺少什么权限，Google之后发现是缺少如下权限：
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />将其添加进AndroidManifest文件中即可。
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