Android组件化开发实战：封装权限管理请求框架(1)

@TargetApi(value = Build.VERSION_CODES.M)

public static List findDeniedPermissions(Activity activity, String… permission) {

List denyPermissions = new ArrayList<>();

for (String value : permission) {

if (activity.checkSelfPermission(value) != PackageManager.PERMISSION_GRANTED) {

denyPermissions.add(value);

}

}

return denyPermissions;

}

/**

• 寻找相应的注解方法

• @param c1 要寻找的那个类

• @param c2 响应的注解标记

• @return

*/

public static List findAnnotationMethods(Class c1, Class<? extends Annotation> c2) {

List methods = new ArrayList<>();

for (Method method : c1.getDeclaredMethods()) {

if (method.isAnnotationPresent(c2)) {

methods.add(method);

}

}

return methods;

}

public static Method findMethodPermissionFailWithRequestCode(Class clazz, Class permissionFailClass, int requestCode) {

for (Method method : clazz.getDeclaredMethods()) {

if (method.isAnnotationPresent(permissionFailClass)) {

if (requestCode == method.getAnnotation(PermissionFail.class).requestCode()) {

return method;

}

}

}

return null;

}

/**

• 找到相应的注解方法（requestCode请求码与需要的一样）

• @param m

• @param c

• @param requestCode

• @return

*/

public static boolean isEqualRequestCodeFromAnntation(Method m, Class c, int requestCode) {

if (c.equals(PermissionFail.class)) {

return requestCode == m.getAnnotation(PermissionFail.class).requestCode();

} else if (c.equals(PermissionSuccess.class)) {

return requestCode == m.getAnnotation(PermissionSuccess.class).requestCode();

} else {

return false;

}

}

public static Method findMethodWithRequestCode(Class c, Class annotation, int requestCode) {

for (Method method : c.getDeclaredMethods()) {

if (method.isAnnotationPresent(annotation)) {

if (isEqualRequestCodeFromAnntation(method, annotation, requestCode)) {

return method;

}

}

}

return null;

}

public static Method findMethodPermissionSuccessWithRequestCode(Class c, Class permissionFailClass, int requestCode) {

for (Method method : c.getDeclaredMethods()) {

if (method.isAnnotationPresent(permissionFailClass)) {

if (requestCode == method.getAnnotation(PermissionSuccess.class).requestCode()) {

return method;

}

}

}

return null;

}

public static Activity getActivity(Object object) {

if (object instanceof Fragment) {

return ((Fragment) object).getActivity();

} else if (object instanceof Activity) {

return (Activity) object;

}

return null;

}

}

3、创建成功和失败的回调接口类，代码如下：

PermissionSuccess.java

/**

• @author 安阳 QQ：15577969

• @version 1.0

• @team 美奇软件开发工作室

• @date 2020/11/23 13:12

*/

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)

@Target(ElementType.METHOD)

public @interface PermissionSuccess {

int requestCode();

}

PermissionFail.java

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

/**

• @author 安阳 QQ：15577969

• @version 1.0

• @team 美奇软件开发工作室

• @date 2020/11/23 13:12

*/

@Target(ElementType.METHOD)

@Retention(RetentionPolicy.RUNTIME)

public @interface PermissionFail {

int requestCode();

}

4、创建OmgPermission.java对象类，这个类就是我们封装的权限框架主体，代码如下：

import android.annotation.TargetApi;

import android.app.Activity;

import android.content.pm.PackageManager;

import android.os.Build;

import androidx.fragment.app.Fragment;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util