android 6系统警报权限..!

Question

我为 android 6 提供了几个运行时权限，但在每次重新启动设备或单击以启动服务时，都会出现一个对话框，系统警报和读取联系人权限。 我的应用程序在后台工作(作为重启后广播调用的服务)这是第一个权限，我注意到上面没有永不询问选项

这是我说的第二个系统警报

现在 我如何才能授予一次权限，再也不会询问我已经在检查权限，但这是不同的事情，它仅用于读取联系人权限

Answer 1

这已经在Android的文档中android.developer.com

Android 发出请求的方式取决于系统版本，以及您的应用所针对的系统版本:

如果设备运行的是 Android 6.0(API 级别 23)或更高版本，并且应用的 targetSdkVersion 为 23 或更高，则应用会从用户在运行时。用户可以随时撤销权限，因此应用在每次访问受权限保护的API时都需要检查自己是否拥有权限。有关在您的应用中请求权限的更多信息，请参阅使用系统权限培训指南。

有可能是你设置的app的targetSdkVersion为22或更低

如前所述:

如果设备运行的是 Android 5.1.1(API 级别 22)或更低版本，或者应用的 targetSdkVersion 为 22 或更低版本，系统会在用户安装应用时要求用户授予权限。如果您向应用程序的更新版本添加新权限，系统会在用户更新应用程序时要求用户授予该权限。用户安装该应用后，他们撤消权限的唯一方法是卸载该应用。

你也可以使用我的自定义权限类

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.StrictMode;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;

import java.lang.reflect.Method;

public class PermissionUtil {

    private static final String TAG = PermissionUtil.class.getSimpleName();

    public static final int REQUEST_EXTERNAL_STORAGE = 1;
    private static final int WRITE_EXTERNAL_PERMISSION_REQUEST_CODE = 1;
    public static final int READ_EXTERNAL_PERMISSION_REQUEST_CODE = 2;
    public static final int RECORD_AUDIO_PERMISSION_REQUEST_CODE = 3;
    public static final int CAMERA_PERMISSION_REQUEST_CODE = 4;

    private static String[] PERMISSIONS_WRITE_STORAGE = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
    private static String[] PERMISSIONS_READ_STORAGE = {Manifest.permission.READ_EXTERNAL_STORAGE};
    private static String[] PERMISSIONS_AUDIO = {Manifest.permission.RECORD_AUDIO};
    private static String[] PERMISSIONS_CAMERA = {Manifest.permission.CAMERA};

    PermissionUtil() { }

    /**
     * SAMPLER
     * Checks if the app has permission to write to device storage
     * <p/>
     * If the app does not has permission then the user will be prompted to grant permissions
     *
     * @param activity the mContext from which permissions are checked
     */
    public static void verifyStoragePermissions(Activity activity) {
        // Check if we have write permission
        int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);

        if (permission != PackageManager.PERMISSION_GRANTED) {
            // We don't have permission so prompt the user
            ActivityCompat.requestPermissions(
                    activity,
                    PERMISSIONS_WRITE_STORAGE,
                    WRITE_EXTERNAL_PERMISSION_REQUEST_CODE
            );
        }
    }

    public static void verrifyReadStoragePermissions(Activity activity) {
        int permission = ActivityCompat.checkSelfPermission(activity, PERMISSIONS_READ_STORAGE[0]);
        if (isPermissionDenied(permission)) {
            processPermission(activity, PERMISSIONS_READ_STORAGE[0], PERMISSIONS_READ_STORAGE, READ_EXTERNAL_PERMISSION_REQUEST_CODE);
        }
    }

    public static void verrifyWriteStoragePermissions(Activity activity) {
        int permission = ActivityCompat.checkSelfPermission(activity, PERMISSIONS_WRITE_STORAGE[0]);
        if (isPermissionDenied(permission)) {
            processPermission(activity, PERMISSIONS_WRITE_STORAGE[0], PERMISSIONS_WRITE_STORAGE, WRITE_EXTERNAL_PERMISSION_REQUEST_CODE);
        }
    }

    public static void verrifyRecordAudioPermissions(Activity activity) {
        int permission = ActivityCompat.checkSelfPermission(activity, PERMISSIONS_AUDIO[0]);
        if (isPermissionDenied(permission)) {
            processPermission(activity, PERMISSIONS_AUDIO[0], PERMISSIONS_AUDIO, RECORD_AUDIO_PERMISSION_REQUEST_CODE);
        }
    }

    public static void verrifyCameraPermissions(Activity activity) {
        int permission = ActivityCompat.checkSelfPermission(activity, PERMISSIONS_CAMERA[0]);
        if (isPermissionDenied(permission)) {
            processPermission(activity, PERMISSIONS_CAMERA[0], PERMISSIONS_CAMERA, CAMERA_PERMISSION_REQUEST_CODE);
        }
    }

    private static boolean isPermissionDenied(int permission) {
        return permission != PackageManager.PERMISSION_GRANTED;
    }

    private static void processPermission(Activity activity, String permissionManifest, String[] permissions, int requestCode) {
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity, permissionManifest)) {
            Log.e(TAG, "shouldShowRequestPermissionRationale is invoked " + permissionManifest);
        } else {
            ActivityCompat.requestPermissions(activity, permissions, requestCode);
            Log.e(TAG, "requestPermissions is invoked " + permissionManifest);
        }
    }

    /**
     * SAMPLER
     * Request the permissions you need
        If your app doesn't already have the permission it needs, the app must call one of the requestPermissions() methods to request the appropriate permissions.
        Your app passes the permissions it wants, and also an integer request code that you specify to identify this permission request.
        This method functions asynchronously: it returns right away, and after the user responds to the dialog box,
        the system calls the app's callback method with the results, passing the same request code that the app passed to requestPermissions().
     * @param activity - you mContext
     */
    public static void verifyShowRequestPrompt(Activity activity) {
        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,
                Manifest.permission.CAMERA)) {

            // Show an explanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.
            Log.e(TAG, "shouldShowRequestPermissionRationale is invoked");
        } else {

            // No explanation needed, we can request the permission.

            ActivityCompat.requestPermissions(activity,
                    new String[]{Manifest.permission.CAMERA},
                    WRITE_EXTERNAL_PERMISSION_REQUEST_CODE);

            // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
            // app-defined int constant. The callback method gets the
            // result of the request.
        }
    }

    /**
     * ABOVE CODES is not used
     * @param activity
     */

    public static void initPermissions(final Activity activity) {
        // The request code used in ActivityCompat.requestPermissions()
        // and returned in the Activity's onRequestPermissionsResult()
        // int PERMISSION_ALL = 1;
        final String[] PERMISSIONS = {
                Manifest.permission.READ_EXTERNAL_STORAGE,
                Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.RECORD_AUDIO,
                Manifest.permission.CAMERA};
        if(!hasPermissions(activity, PERMISSIONS)) {
            showMessageOKCancel(activity, "These permissions are mandatory for the application. Please allow access.",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            if (!hasPermissions(activity, PERMISSIONS)) {
                                ActivityCompat.requestPermissions(activity, PERMISSIONS, REQUEST_EXTERNAL_STORAGE);
                            }
                        }
                    });
        }

        setGAlleryPermissionIntent();
    }

    public static void initPermissions(final Context context) {
        // The request code used in ActivityCompat.requestPermissions()
        // and returned in the Activity's onRequestPermissionsResult()
        // int PERMISSION_ALL = 1;
        final String[] PERMISSIONS = {
                Manifest.permission.READ_EXTERNAL_STORAGE,
                Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.RECORD_AUDIO,
                Manifest.permission.CAMERA};
        if(!hasPermissions(context, PERMISSIONS)) {
            showMessageOKCancel(context, "These permissions are mandatory for the application. Please allow access.",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            if (!hasPermissions(context, PERMISSIONS)) {
                                ActivityCompat.requestPermissions((Activity) context, PERMISSIONS, REQUEST_EXTERNAL_STORAGE);
                            }
                        }
                    });
        }

        setGAlleryPermissionIntent();
    }

    public static boolean hasPermissions(final Context context, final String... permissions) {
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
            for (String permission : permissions) {
                if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                     return false;
                }
            }
        }
        return true;
    }

    private static void showMessageOKCancel(Context context, String message, DialogInterface.OnClickListener okListener) {
        new AlertDialog.Builder(context)
                .setMessage(message)
                .setPositiveButton("OK", okListener)
                .setNegativeButton("Cancel", null)
                .create()
                .show();
    }

    public static void setGAlleryPermissionIntent() {
        if(Build.VERSION.SDK_INT>=24){
            try{
                Method m = StrictMode.class.getMethod("disableDeathOnFileUriExposure");
                m.invoke(null);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
}

只需在您的 Activity 中调用它即可。

   void onCreate(...) {
      PermissionUtil.verrifyReadStoragePermissions(this);
      ...
   }