在 Android Marshmallow 检查权限
Posted
技术标签:
【中文标题】在 Android Marshmallow 检查权限【英文标题】:Check Permission at Android Marshmallow 【发布时间】:2017-07-15 16:44:50 【问题描述】:我正在 Eclipse IDE 中编写一个图形程序并使用 23 api 版本进行编译,minSdkVersion="11",这对我来说保持 targetSdkVersion="16" 很重要。 我必须在我的一项活动(DarjActivity)中使用设备摄像头。一切正常,但由于我试图改进我的代码以支持 android marshmallow (api 23) 的权限,所以添加了导致一些错误的 Check_Permission 类。请指导我解决这个令人困惑的问题! 感谢您的问候。
DarjActivity 类:
private void selectImage()
final CharSequence[] items = "camera", "gallery",
"cancel" ;
AlertDialog.Builder builder = new AlertDialog.Builder(DarjActivity.this);
builder.setTitle("capture photo");
builder.setItems(items, new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface dialog, int item)
boolean result=Check_Permission.checkPermission(DarjActivity.this);
if (items[item].equals("camera"))
// userChoosenTask="Take Photo";
if(result);
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
else if (items[item].equals("gallery"))
// userChoosenTask="Choose from Library";
if(result);
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);//
startActivityForResult(Intent.createChooser(intent, "select"),2);
else if (items[item].equals("cancel"))
dialog.dismiss();
);
builder.show();
Check_Permission 类:
package com.codegostarNiloo.negar;
import android.Manifest;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
public class Check_Permission
public static final int MY_PERMISSIONS_REQUEST_CAMERA = 123;
public static boolean checkPermission(final Context context)
int currentAPIVersion = Build.VERSION.SDK_INT;
if(Build.VERSION.SDK_INT >= 23)
// if(currentAPIVersion>=Build.VERSION_CODES.M)
if (ContextCompat.checkSelfPermission((Activity) context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) context, Manifest.permission.CAMERA))
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Check Permission");
alertBuilder.setMessage("pleas let this applicathion to use your device camera");
alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener()
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void onClick(DialogInterface dialog, int which)
ActivityCompat.requestPermissions((Activity) context, new String[]Manifest.permission.READ_EXTERNAL_STORAGE, MY_PERMISSIONS_REQUEST_CAMERA);
);
AlertDialog alert = alertBuilder.create();
alert.show();
else
ActivityCompat.requestPermissions((Activity) context, new String[]Manifest.permission.CAMERA, MY_PERMISSIONS_REQUEST_CAMERA);
return false;
else
return true;
else
return true;
在 Check_Permission 类中, (checkSelfPermission) 、 (shouldShowRequestPermissionRationale) 和 (requestPermissions) 方法发生错误。 对于它们的第一个参数,我放置了(Activity)上下文、上下文上下文、上下文、this.Activity、Activity.this、DarjActivity 和 ext。我更新并替换了 bin 文件夹中的一些 android-support-v4.jar 文件。
AndroidManifest 权限:
<uses-feature android:name="android.hardware.camera"></uses-feature>
<uses-feature android:name="android.hardware.camera" android:required="false"></uses-feature>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="ANDROID.PERMISSION.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="16" />
【问题讨论】:
忽略代码中的任何错误,如果您拒绝将targetSdkVersion
向上移动,这是浪费的工作。运行时权限仅在您面向 API 23 及更高版本时可用。为什么不能更改目标版本?
发生了什么错误?请更具体
@0X0nosugar (error): ContextCompat 类型的方法 checkSelfPermission(Activity, String) 未定义 ActivityCompat 类型的方法 shouldShowRequestPermissionRationale(Activity, String) 未定义
@Tanis.7x :我已经改进了我的目标和构建目标版本到 23 并且错误仍然存在! :(
【参考方案1】:
第 1 步。
首先在您的活动中实现 ActivityCompat.OnRequestPermissionsResultCallback
private static final int REQUEST_CAMERA_PERMISSION = 1;
private static final String FRAGMENT_DIALOG = "dialog";
第 2 步覆盖方法
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
switch (requestCode)
case REQUEST_CAMERA_PERMISSION:
if (permissions.length != 1 || grantResults.length != 1)
throw new RuntimeException("Error on requesting camera permission.");
if (grantResults[0] != PackageManager.PERMISSION_GRANTED)
Toast.makeText(this, R.string.camera_permission_not_granted,
Toast.LENGTH_SHORT).show();
// No need to start camera here; it is handled by onResume
break;
@Override
protected void onResume()
super.onResume();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
== PackageManager.PERMISSION_GRANTED)
// Do whatever you want to do after the permission granted.
else if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA))
ConfirmationDialogFragment
.newInstance(R.string.camera_permission_confirmation,
new String[]Manifest.permission.CAMERA,
REQUEST_CAMERA_PERMISSION,
R.string.camera_permission_not_granted)
.show(getSupportFragmentManager(), FRAGMENT_DIALOG);
else
ActivityCompat.requestPermissions(this, new String[]Manifest.permission.CAMERA,
REQUEST_CAMERA_PERMISSION);
步骤 3 编写一个对话框片段来请求权限 - 公共静态类 ConfirmationDialogFragment 扩展 DialogFragment
private static final String ARG_MESSAGE = "message";
private static final String ARG_PERMISSIONS = "permissions";
private static final String ARG_REQUEST_CODE = "request_code";
private static final String ARG_NOT_GRANTED_MESSAGE = "not_granted_message";
public static ConfirmationDialogFragment newInstance(@StringRes int message,
String[] permissions, int requestCode, @StringRes int notGrantedMessage)
ConfirmationDialogFragment fragment = new ConfirmationDialogFragment();
Bundle args = new Bundle();
args.putInt(ARG_MESSAGE, message);
args.putStringArray(ARG_PERMISSIONS, permissions);
args.putInt(ARG_REQUEST_CODE, requestCode);
args.putInt(ARG_NOT_GRANTED_MESSAGE, notGrantedMessage);
fragment.setArguments(args);
return fragment;
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
final Bundle args = getArguments();
return new AlertDialog.Builder(getActivity())
.setMessage(args.getInt(ARG_MESSAGE))
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface dialog, int which)
String[] permissions = args.getStringArray(ARG_PERMISSIONS);
if (permissions == null)
throw new IllegalArgumentException();
ActivityCompat.requestPermissions(getActivity(),
permissions, args.getInt(ARG_REQUEST_CODE));
)
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface dialog, int which)
Toast.makeText(getActivity(),
args.getInt(ARG_NOT_GRANTED_MESSAGE),
Toast.LENGTH_SHORT).show();
)
.create();
第 4 步始终检查 onResume() 以获得相机权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
== PackageManager.PERMISSION_GRANTED)
// Do whatever you want to do if permission granted
else if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA))
ConfirmationDialogFragment
.newInstance(R.string.camera_permission_confirmation,
new String[]Manifest.permission.CAMERA,
REQUEST_CAMERA_PERMISSION,
R.string.camera_permission_not_granted)
.show(getSupportFragmentManager(), FRAGMENT_DIALOG);
else
ActivityCompat.requestPermissions(this, new String[] Manifest.permission.CAMERA,
REQUEST_CAMERA_PERMISSION);
希望对你有帮助!!
【讨论】:
感谢您的帮助。但是,我无法在我的 DarjActivity 中实现 ActivityCompat.OnRequestPermissionsResultCallback,因为在 eclipse 中发生错误(ActivityCompat 无法解析为类型)并提供快速修复:创建接口 ActivityCompat。 1-请写下如何实现它和它的进口,好吗? 2-我的 DarjActivity 中是否有第一步和第二步,或者我必须创建一个新类?【参考方案2】:或者只使用像PermissionsDispatcher 或Dexter 或EasyPermissions 或许多others 这样的简单库。为什么你需要用权限处理来污染你的代码?
【讨论】:
那么日食呢,亲爱的?!以上是关于在 Android Marshmallow 检查权限的主要内容,如果未能解决你的问题,请参考以下文章
Android Marshmallow:使用 Espresso 测试权限?
Android 6.0 (Marshmallow) READ_CONTACTS 权限允许在权限被拒绝时读取联系人的姓名
在 Genymotion 中测试打盹功能(Android 6.0 Marshmallow)
如何在 Android 6.0 Marshmallow 中访问相机?