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 fun checkPermissions(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val permissions = arrayOf<String>(
                    Manifest.permission.GET_ACCOUNTS,
                    Manifest.permission.ACCOUNT_MANAGER,
                    Manifest.permission.WRITE_SYNC_SETTINGS,
            )
            val BLE_PERMISSION = 8902
            var permissionCheck = 0
            for (permission in permissions) {
                permissionCheck += checkSelfPermission(permission)
            }
            if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(permissions, BLE_PERMISSION) //requestPermissions是Activity中的api
                return false
            }
        }
        return true
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String?>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        val BLE_PERMISSION = 8902
        if (requestCode == BLE_PERMISSION) {
            //boolean ret = true;
            //for (int result : grantResults){//检查所有权限
            //    if (result != PackageManager.PERMISSION_GRANTED){
            //        ret = false;
            //        break;
            //    }
            //}
            if (grantResults.size > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {  //权限申请成功。
                //成功...
            } else {
                Log.e("MainActivity", "onRequestPermissionsResult: result = false")
            }
        }
    }

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 = 8902

            var permissionCheck = 0

            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 = 8902

        if (requestCode == PERMISSION_CODE) {
            //var ret = 0
            //for (result in grantResults) {//检查所有权限
            //    ret += result
            //    if (result != PackageManager.PERMISSION_GRANTED) {
            //        break
            //    }
            //}
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {  //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 = 63358;
            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 = 63358;
        if (requestCode == permissionID && grantResults != null) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //业务函数
            } else {
                Snackbar.make(operatorPager, R.string.err_permission_denied,Snackbar.LENGTH_LONG).show();
            }
        }
    }