做外贸产品上什么网站,网站设置不安全,如何设计一个网页并举例说明,建立公司网站多少钱之前一篇博客初试了Android6.0系统的动态权限申请#xff0c;成功之后开始思考将权限申请功能封装以供更加方便的调用。 查阅6.0系统权限相关的API#xff0c;整个权限申请需要调用三个方法#xff1a; 1. ContextCompat.checkSelfPermission()
检查应用是否拥有该权限成功之后开始思考将权限申请功能封装以供更加方便的调用。 查阅6.0系统权限相关的API整个权限申请需要调用三个方法 1. ContextCompat.checkSelfPermission()
检查应用是否拥有该权限被授权返回值为PERMISSION_GRANTED否则返回PERMISSION_DENIED /*** Determine whether emyou/em have been granted a particular permission.** param permission The name of the permission being checked.** return {link android.content.pm.PackageManager#PERMISSION_GRANTED} if you have the* permission, or {link android.content.pm.PackageManager#PERMISSION_DENIED} if not.** see android.content.pm.PackageManager#checkPermission(String, String)*/public static int checkSelfPermission(NonNull Context context, NonNull String permission) {if (permission null) {throw new IllegalArgumentException(permission is null);}return context.checkPermission(permission, android.os.Process.myPid(), Process.myUid());}2、ActivityCompat.requestPermissions()/*** Requests permissions to be granted to this application. These permissions* must be requested in your manifest, they should not be granted to your app,* and they should have protection level {link android.content.pm.PermissionInfo* #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by* the platform or a third-party app.* p* Normal permissions {link android.content.pm.PermissionInfo#PROTECTION_NORMAL}* are granted at install time if requested in the manifest. Signature permissions* {link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at* install time if requested in the manifest and the signature of your app matches* the signature of the app declaring the permissions.* /p* p* If your app does not have the requested permissions the user will be presented* with UI for accepting them. After the user has accepted or rejected the* requested permissions you will receive a callback reporting whether the* permissions were granted or not. Your activity has to implement {link* android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback}* and the results of permission requests will be delivered to its {link* android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback#onRequestPermissionsResult(* int, String[], int[])} method.* /p* p* Note that requesting a permission does not guarantee it will be granted and* your app should be able to run without having this permission.* /p* p* This method may start an activity allowing the user to choose which permissions* to grant and which to reject. Hence, you should be prepared that your activity* may be paused and resumed. Further, granting some permissions may require* a restart of you application. In such a case, the system will recreate the* activity stack before delivering the result to your onRequestPermissionsResult(* int, String[], int[]).* /p* p* When checking whether you have a permission you should use {link* #checkSelfPermission(android.content.Context, String)}.* /p** param activity The target activity.* param permissions The requested permissions.* param requestCode Application specific request code to match with a result* reported to {link OnRequestPermissionsResultCallback#onRequestPermissionsResult(* int, String[], int[])}.** see #checkSelfPermission(android.content.Context, String)* see #shouldShowRequestPermissionRationale(android.app.Activity, String)*/public static void requestPermissions(final NonNull Activity activity,final NonNull String[] permissions, final int requestCode) {if (Build.VERSION.SDK_INT 23) {ActivityCompatApi23.requestPermissions(activity, permissions, requestCode);} else if (activity instanceof OnRequestPermissionsResultCallback) {Handler handler new Handler(Looper.getMainLooper());handler.post(new Runnable() {Overridepublic void run() {final int[] grantResults new int[permissions.length];PackageManager packageManager activity.getPackageManager();String packageName activity.getPackageName();final int permissionCount permissions.length;for (int i 0; i permissionCount; i) {grantResults[i] packageManager.checkPermission(permissions[i], packageName);}((OnRequestPermissionsResultCallback) activity).onRequestPermissionsResult(requestCode, permissions, grantResults);}});}}3、AppCompatActivity.onRequestPermissionsResult() 该方法类似于Activity的OnActivityResult()的回调方法主要接收请求授权的返回值 下面开始在项目中进行权限封装 1、新建一个BaseActivity活动extends自AppCompatActivity。这里将权限申请设计成基类让项目中的所有活动都继承BaseActivity类。 延伸学习关于extends和implements的区别参考 2、声明两个Map类型的变量用于存放取得权限后的运行和未获取权限时的运行。 延伸学习java中Map,List与Set的区别 private MapInteger, Runnable allowablePermissionRunnables new HashMap();private MapInteger, Runnable disallowblePermissionRunnables new HashMap();
3、实现requesPermission方法。 * param requestId 请求授权的Id唯一即可* param permission 请求的授权* param allowableRunnable 同意授权后的操作* param disallowableRunnable 禁止授权后的操作**/protected void requestPermission(int requestId, String permission,Runnable allowableRunnable, Runnable disallowableRunnable) {if (allowableRunnable null) {throw new IllegalArgumentException(allowableRunnable null);}allowablePermissionRunnables.put(requestId, allowableRunnable);if (disallowableRunnable ! null) {disallowblePermissionRunnables.put(requestId, disallowableRunnable);}//版本判断if (Build.VERSION.SDK_INT 23) {//检查是否拥有权限int checkPermission ContextCompat.checkSelfPermission(MyApplication.getContext(), permission);if (checkPermission ! PackageManager.PERMISSION_GRANTED) {//弹出对话框请求授权ActivityCompat.requestPermissions(BaseActivity.this, new String[]{permission}, requestId);return;} else {allowableRunnable.run();}} else {allowableRunnable.run();}}
4、实现onRequestPermissionsResult方法。Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);if (grantResults[0] PackageManager.PERMISSION_GRANTED){Runnable allowRunallowablePermissionRunnables.get(requestCode);allowRun.run();}else {Runnable disallowRun disallowblePermissionRunnables.get(requestCode);disallowRun.run();}}
5、调用public static final String CONTACT_PERMISSION android.Manifest.permission.READ_CONTACTS;public static final int readContactRequest 1;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.content_get_contacts);ContactsLv (ListView) findViewById(R.id.ContactsLv);adapter new ContactsAdapter(list, this);ContactsLv.setAdapter(adapter);requestPermission(readContactRequest, CONTACT_PERMISSION, new Runnable() {Overridepublic void run() {getContacts();}}, new Runnable() {Overridepublic void run() {getContactsDenied();}});}
