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
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<!-- 蓝牙相关权限-->
<uses-permission android:name="android.permission.BLUETOOTH"
android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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();
}
}