easypermissions的基本使用

转载请注明出处 http://blog.csdn.net/pyfysf/article/details/78204395

Android 6.0（API 级别 23）开始，在应用运行时向其授予权限，而不是在应用安装时授予。这样可以让用户对应用的功能进行更多控制；

系统权限分为两类：正常权限和危险权限：

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正常权限不会直接给用户隐私权带来风险。如果你的应用在其清单中列出了正常权限，系统将自动授予该权限。

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危险权限会授予应用访问用户隐私数据的权限。如果你列出了危险权限，则用户必须明确批准您的应用使用这些权限。

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注：从 Android 6.0（API 级别 23）开始，用户可以随时从任意应用调用权限，即使应用面向较低的 API 级别也可以调用。无论您的应用面向哪个 API 级别，您都应对应用进行测试，以验证它在缺少需要的权限时行为是否正常。

• 正常权限

NFC  READ_SYNC_SETTINGS  READ_SYNC_STATS  RECEIVE_BOOT_COMPLETED  REORDER_TASKS  REQUEST_INSTALL_PACKAGES  SET_ALARM  SET_TIME_ZONE  SET_WALLPAPER  SET_WALLPAPER_HINTS  TRANSMIT_IR  UNINSTALL_SHORTCUT  USE_FINGERPRINT  VIBRATE  WAKE_LOCK  WRITE_SYNC_SETTINGS ACCESS_LOCATION_EXTRA_COMMANDS  ACCESS_NETWORK_STATE  ACCESS_NOTIFICATION_POLICY  ACCESS_WIFI_STATE  BLUETOOTH  BLUETOOTH_ADMIN  BROADCAST_STICKY  CHANGE_NETWORK_STATE  CHANGE_WIFI_MULTICAST_STATE  CHANGE_WIFI_STATE  DISABLE_KEYGUARD  EXPAND_STATUS_BAR  GET_PACKAGE_SIZE  INSTALL_SHORTCUT  INTERNET  KILL_BACKGROUND_PROCESSES  MODIFY_AUDIO_SETTINGS  

• 危险权限

group:android.permission-group.CONTACTS    permission:android.permission.WRITE_CONTACTS    permission:android.permission.GET_ACCOUNTS    permission:android.permission.READ_CONTACTS  group:android.permission-group.PHONE    permission:android.permission.READ_CALL_LOG    permission:android.permission.READ_PHONE_STATE    permission:android.permission.CALL_PHONE    permission:android.permission.WRITE_CALL_LOG    permission:android.permission.USE_SIP    permission:android.permission.PROCESS_OUTGOING_CALLS    permission:com.android.voicemail.permission.ADD_VOICEMAIL  group:android.permission-group.CALENDAR    permission:android.permission.READ_CALENDAR    permission:android.permission.WRITE_CALENDAR  group:android.permission-group.CAMERA    permission:android.permission.CAMERA  group:android.permission-group.SENSORS    permission:android.permission.BODY_SENSORS  group:android.permission-group.LOCATION    permission:android.permission.ACCESS_FINE_LOCATION    permission:android.permission.ACCESS_COARSE_LOCATION  group:android.permission-group.STORAGE    permission:android.permission.READ_EXTERNAL_STORAGE    permission:android.permission.WRITE_EXTERNAL_STORAGE  group:android.permission-group.MICROPHONE    permission:android.permission.RECORD_AUDIO  group:android.permission-group.SMS    permission:android.permission.READ_SMS    permission:android.permission.RECEIVE_WAP_PUSH    permission:android.permission.RECEIVE_MMS    permission:android.permission.RECEIVE_SMS    permission:android.permission.SEND_SMS    permission:android.permission.READ_CELL_BROADCASTS 

因此，如果API 23及以上时，我们申请危险权限时，除了在清单文件配置，还要在代码中进行动态申请

我们可以自己去写代码进行权限代码申请，这种方法可以参考这样一篇博客

Android6.0及以上版本申请权限讲解

利用easypermissions进行权限申请

首先在app项目下的build.gradle中添加

android {....}repositories {    maven {        url "http://maven.aliyun.com/nexus/content/repositories/releases"    }}dependencies {....    compile 'pub.devrel:easypermissions:1.0.1'}

这里以照相机权限和位置权限作为例子来讲解；
首先在清单文件（AndroidManifest.xml）中声明这两个属性

    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

然后在Activity中重写：

    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        // Forward results to EasyPermissions        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);    }

然后我们就可以直接在Activity中书写请求权限的代码了

//请求码 @AfterPermissionGranted(RC_CAMERA_AND_LOCATION)    private void methodRequiresTwoPermission() {        String[] perms = {Manifest.permission.CAMERA,                Manifest.permission.ACCESS_FINE_LOCATION};        if (EasyPermissions.hasPermissions(this, perms)) {            // Already have permission, do the thing            // ...             Toast.makeText(this, "已经授权", Toast.LENGTH_SHORT).show();            //表明已经授权，可以进行用户授予权限的操作        } else {            // Do not have permissions, request them now//弹出一个对话框进行提示用户            EasyPermissions.requestPermissions(this, "应用时需要照相机权限",                    RC_CAMERA_AND_LOCATION, perms);        }    }

第一次打开app之后，拒绝权限。第二次进入app就会弹出这个对话框

在oncreate方法中调用这个方法就可以了。

完整的MainActivity

public class MainActivity extends AppCompatActivity  {    private static final int RC_CAMERA_AND_LOCATION = 100;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        methodRequiresTwoPermission();    }    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        // Forward results to EasyPermissions        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);    }    @AfterPermissionGranted(RC_CAMERA_AND_LOCATION)    private void methodRequiresTwoPermission() {        String[] perms = {Manifest.permission.CAMERA,                Manifest.permission.ACCESS_FINE_LOCATION};        if (EasyPermissions.hasPermissions(this, perms)) {            // Already have permission, do the thing            // ...             Toast.makeText(this, "已经授权", Toast.LENGTH_SHORT).show();        } else {            // Do not have permissions, request them now            EasyPermissions.requestPermissions(this, "应用时需要照相机权限",                    RC_CAMERA_AND_LOCATION, perms);        }    }}

easypermissions的github地址，更多详细代码点击这里