Android 申请权限示例

1.在Mainifest.xml中添加

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:dist="http://schemas.android.com/apk/distribution"
     package="com.example.ble">

     <dist:module dist:instant="true" />

     <uses-permission android:name="android.permission.BLUETOOTH"/>
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>

     <application
         android:allowBackup="true"
         android:icon="@mipmap/bluetooth"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>

 </manifest>

2.在activity中申请

  　　private boolean checkPermissions(){
         if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {

             String[] permissions = {
                 Manifest.permission.BLUETOOTH,
                 Manifest.permission.BLUETOOTH_ADMIN,
                 Manifest.permission.ACCESS_COARSE_LOCATION,
                 Manifest.permission.ACCESS_FINE_LOCATION,
             };

             final int BLE_PERMISSION = ;

             int permissionCheck =  ;

             for (String permission : permissions){
                 permissionCheck += checkSelfPermission(permission);
             }
             if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
                 requestPermissions(permissions,BLE_PERMISSION);//requestPermissions是Activity中的api
                 return false;
             }
         }
         return true;
     }
     @RequiresApi(api = Build.VERSION_CODES.M)
     @Override
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         final int BLE_PERMISSION = ;

         if (requestCode == BLE_PERMISSION && grantResults != null) {
             boolean ret = true;
             for (int result : grantResults){//检查所有权限
                 if (result != PackageManager.PERMISSION_GRANTED){
                     ret = false;
                     break;
                 }
             }
             if (ret) {  //所有权限申请成功。
                 setupBLE();
             } else {
                 ret = shouldShowRequestPermissionRationale(permissions[]);
                 Log.e("MainActivity", "onRequestPermissionsResult: result = " + ret );
             }
         }
     }

3.在Fragment中申请

3.1申请多权限

     private fun checkPermissions(): Boolean {

         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             val permissions = arrayOf(
                 Manifest.permission.WRITE_EXTERNAL_STORAGE
             )
             val PERMISSION_CODE = 

             var permissionCheck = 

             if (context == null ) return false

             for (permission in permissions) {
                 var check : Int? = context?.checkSelfPermission(permission)
                 if (check != null) {
                     permissionCheck += check
                 }else{
                     return false
                 }
             }
             if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
                 requestPermissions(permissions, PERMISSION_CODE)
                 return false
             }
         }
         return true
     }

     @RequiresApi(api = Build.VERSION_CODES.M)
     override fun onRequestPermissionsResult(
         requestCode: Int,
         permissions: Array<String>,
         grantResults: IntArray
     ) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         val PERMISSION_CODE = 

         if (requestCode == PERMISSION_CODE && grantResults != null) {
             var ret =
             for (result in grantResults) {//检查所有权限
                 ret += result
                 if (result != PackageManager.PERMISSION_GRANTED) {
                     break
                 }
             }
             if (ret == ) {  //所有权限申请成功。
                 parseJson("test.json")
             }
         }
     }

3.2 申请单个权限

     @OnClick(R.id.btn_analy_import)
     public void onImportClicked(View view){
         if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
             final int permissionID = ;
             int write = getActivity().checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
             if (write != PackageManager.PERMISSION_GRANTED) {
                 String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
                 requestPermissions(permissions, permissionID);//fragment基类中的函数
             }else{
                 //业务函数
             }
         }
     }

     @Override
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         Log.e("CompareFrgmt", "onRequestPermissionsResult: requestCode = " + requestCode );
         final int permissionID = ;
         if (requestCode == permissionID && grantResults != null) {
             if (grantResults[] == PackageManager.PERMISSION_GRANTED) {
                 //业务函数
             } else {
                 Snackbar.make(operatorPager, R.string.err_permission_denied,Snackbar.LENGTH_LONG).show();
             }
         }
     }