管理android 11问题的外部存储权限

Question

大家好，我想在我的代码中添加Android11及以上版本的存储权限，尽管添加了下面的权限()

<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="29"
    tools:ignore="ScopedStorage" />
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
    tools:ignore="ScopedStorage" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

清单中的我不能访问android 11的存储程序，您能给我必要的代码来添加这个权限管理器吗？

public abstract class PermissionsManager implements ActivityCompat.OnRequestPermissionsResultCallback {
private Activity activity;
private boolean grantedPermissions;
private String[] permissions;
private int requestCode;

protected PermissionsManager(Activity activity) {
    this.activity = activity;
    ((MainActivity) activity).setOnRequestPermissionsResultListener(this);
}

private boolean notGrantedPermission(String permission) {
    return ContextCompat.checkSelfPermission(activity, permission) != PackageManager
            .PERMISSION_GRANTED;
}

public void checkPermissions(String permission, int requestCode) {
    try {
        checkPermissions(new String[]{permission}, requestCode);
    }//end try
    catch (Exception e){
        e.printStackTrace();
    }// end catch
}

public void checkPermissions(String[] permissions, int requestCode) {
    try {
        this.permissions = permissions;
        this.requestCode = requestCode;
        for (String permission : permissions) {
            if (notGrantedPermission(permission)) {
                if (ActivityCompat.shouldShowRequestPermissionRationale(activity, permission)) {
                    showRequestPermissionRationale();
                } else {
                    requestPermissions();
                }
                break;
            } else grantedPermissions = true;
        }
        if (grantedPermissions) onPermissionsGranted();
    }//end try
    catch (Exception e){
        e.printStackTrace();
    }// catch
}

public void requestPermissions() {
    ActivityCompat.requestPermissions(activity, permissions, requestCode);
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,  int[] grantResults) {
    for (int i = 0; i < permissions.length; i++) {
        if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
            if (!ActivityCompat.shouldShowRequestPermissionRationale(activity,
                    permissions[i])) {
                grantedPermissions = false;
                requestDisallowedAction();
            } else {
                grantedPermissions = false;
                onPermissionsDenied();
            }
            break;
        } else grantedPermissions = true;
    }
    if (grantedPermissions) onPermissionsGranted();
}

/**
 * add code here to tell users what permissions you need granted and why you need each
 * permission. Should call requestPermissions() after showing rationale.
 */
public abstract void showRequestPermissionRationale();

/**
 * add code here when permissions can't be requested. Either disable feature, direct user to
 * settings to allow user to set permissions, ask user to uninstall, or etc.
 */
public abstract void requestDisallowedAction();

public abstract void onPermissionsGranted();

public abstract void onPermissionsDenied();

}

Answer 1

是的，是真的。虽然与Android 11和Android 10相比，由于安全问题，google更新了很多变化。

不，这不是许可问题。如果您尝试访问此路径mnt/sdcard/其限制现在。如果应用程序没有选择退出作用域存储，并请求READ_EXTERNAL_STORAGE许可。

请参考此链接https://developer.android.com/about/versions/11/privacy/storage

解决方案1-尝试使用此文件访问路径是Android/data/data/packageName/

我的意思是，如果您使用这个逻辑来访问文件- Environment.getExternalStorageDirectory()而不是上面的话，那么尝试this - Context.getExternalFilesDir(null)

解决方案2-如果您管理媒体文件，然后尝试引用此链接https://source.android.com/devices/media/media-provider

我希望它能帮助你..。