androidQ 訪問SD卡權限問題

一、在AndroidManifest.xml中加入android:requestLegacyExternalStorage="true" ，如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.xxx"
          xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:requestLegacyExternalStorage="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".xxActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

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

</manifest>

二，動態申請權限

private void initPermission(Activity activity){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
                    ||ContextCompat.checkSelfPermission(activity, Manifest.permission.READ_SMS) != PackageManager.PERMISSION_GRANTED
            ) {
                // 檢查權限狀態
                if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                    //  用戶徹底拒絕授予權限
                } else {
                    //  用戶未徹底拒絕授予權限
                    ActivityCompat.requestPermissions(activity, PermissionUtil.PERMISSIONS, PermissionUtil.REQUEST);
                }
            }else{
                Toast.makeText(activity,"已經授權 ： "+Manifest.permission.WRITE_EXTERNAL_STORAGE,Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    public void  onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1) {
            for (int i=0;i<grantResults.length;i++ ) {
                if (grantResults[i] ==  PackageManager.PERMISSION_GRANTED) {
                    // 申請成功
                    Toast.makeText(BackupAndRecoverContactActivity.this,"申請成功 ： "+ PermissionUtil.PERMISSIONS[i],Toast.LENGTH_SHORT).show();
                } else {
                    // 申請失敗
                    Toast.makeText(BackupAndRecoverContactActivity.this,"申請失敗 ： "+PermissionUtil.PERMISSIONS[i],Toast.LENGTH_SHORT).show();
                }
            }
        }
    }

public class PermissionUtil {

    public static final int REQUEST = 1;
    public static String[] PERMISSIONS = {
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_SMS};
}