我的sdk版本如下，测试用的redme note 11T pro安卓版本13
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "xxxx
minSdkVersion 19
targetSdkVersion 30
versionCode 1
versionName "1.0"
multiDexEnabled true
testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
}
dependencies {
classpath 'com.android.tools.build:gradle:4.0.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
#Mon Jan 09 09:50:14 CST 2023
distributionBase=GRADLE_USER_HOME
distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip
distributionPath=wrapper/dists
zipStorePath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
找了几个都是爆红的，可能不适配
找到一个可以用的
清单文件
android:maxSdkVersion="30" /> android:maxSdkVersion="30" /> MainActivity //获取蓝牙适配器 public static BluetoothAdapter mBluetoothAdapter = null; //蓝牙状态监听广播 public class BlueToothReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { switch (intent.getAction()) { case BluetoothAdapter.ACTION_STATE_CHANGED: int blueState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0); switch (blueState) { case BluetoothAdapter.STATE_TURNING_ON: Log.e("onReceive", "---------蓝牙正在打开中"); break; case BluetoothAdapter.STATE_ON: Log.e("onReceive", "---------蓝牙已经打开"); mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); break; case BluetoothAdapter.STATE_TURNING_OFF: Log.e("onReceive", "---------蓝牙正在关闭中"); break; case BluetoothAdapter.STATE_OFF: Log.e("onReceive", "---------蓝牙已经关闭"); break; } break; } } } private IntentFilter makeFilter() { IntentFilter filter = new IntentFilter(); filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); return filter; } //Android12蓝牙权限申请 private boolean bluePermission(){ //compileSdkVersion项目中编译SDK版本大于30申请以下权限可使用 //Manifest.permission.BLUETOOTH_SCAN、Manifest.permission.BLUETOOTH_ADVERTISE、Manifest.permission.BLUETOOTH_CONNECT //若小于30可以直接使用权限对应的字符串 if (Build.VERSION.SDK_INT>30){ if (ContextCompat.checkSelfPermission(this, "android.permission.BLUETOOTH_SCAN") != PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, "android.permission.BLUETOOTH_ADVERTISE") != PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, "android.permission.BLUETOOTH_CONNECT") != PERMISSION_GRANTED){ ActivityCompat.requestPermissions(this,new String[]{ "android.permission.BLUETOOTH_SCAN", "android.permission.BLUETOOTH_ADVERTISE", "android.permission.BLUETOOTH_CONNECT"}, 1); return false; } } return true; } private void openBlueTooth(){ if (bluePermission()) mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); else return; BlueToothReceiver btlr = new BlueToothReceiver(); this.registerReceiver(btlr, makeFilter()); if (!mBluetoothAdapter.isEnabled()) {// 判断是否打开蓝牙 //showHandlerToast("请先开启蓝牙!"); //弹出对话框提示用户是后打开 //Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); //startActivityForResult(intent, SEARCH_CODE); // 不做提示，强行打开 mBluetoothAdapter.enable(); } }