package com.lcjian.library.permission;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.net.Uri;
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import android.os.Build;
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import android.provider.Settings;
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import android.support.annotation.NonNull;
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import android.support.v4.app.ActivityCompat;
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import android.support.v4.content.ContextCompat;
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import java.util.ArrayList;
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public class PermissionHelper {
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private Activity mActivity;//当前activity
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private PermissionInterface mPermissionInterface;//权限返回接口
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public PermissionHelper(@NonNull Activity activity, @NonNull PermissionInterface permissionInterface) {
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mActivity = activity;
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mPermissionInterface = permissionInterface;
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}
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/**
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* 开始请求权限。
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* 方法内部已经对Android M 或以上版本进行了判断，外部使用不再需要重复判断。
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* 如果设备还不是M或以上版本，则也会回调到requestPermissionsSuccess方法。
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*/
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public void requestPermissions() {
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//获取要请求的权限
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String[] deniedPermissions = getDeniedPermissions(mActivity, mPermissionInterface.getPermissions());
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//deniedPermissions不为空长度大于0表示有未请求的权限
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if (deniedPermissions != null && deniedPermissions.length > 0) {
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//弹出权限请求框
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requestPermissions(mActivity, deniedPermissions, mPermissionInterface.getPermissionsRequestCode());
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} else {
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//权限请求成功
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mPermissionInterface.requestPermissionsSuccess();
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}
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}
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/**
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* 弹出对话框请求权限
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*
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* @param activity
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* @param permissions
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* @param requestCode
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*/
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public static void requestPermissions(Activity activity, String[] permissions, int requestCode) {
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// if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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// 请求权限兼容低版本
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ActivityCompat.requestPermissions(activity, permissions, requestCode);
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// }
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}
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/**
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* 在Activity中的onRequestPermissionsResult中调用
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* 请求权限结果 回调权限是否请求成功
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*
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* @param requestCode 权限请求码
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* @param permissions 申请的权限
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* @param grantResults
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* @return true 代表对该requestCode感兴趣，并已经处理掉了。false 对该requestCode不感兴趣，不处理。
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*/
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public boolean requestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
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//权限请求码一致
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if (requestCode == mPermissionInterface.getPermissionsRequestCode()) {
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boolean isAllGranted = true;//是否全部权限已授权
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for (int result : grantResults) {
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//未授权权限
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if (result == PackageManager.PERMISSION_DENIED) {
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isAllGranted = false;
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break;
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}
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}
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if (isAllGranted) {
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//已全部授权
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mPermissionInterface.requestPermissionsSuccess();
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} else {
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//权限有缺失
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mPermissionInterface.requestPermissionsFail();
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showSettingDialog();//弹出设置框
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}
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return isAllGranted;
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}
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return false;
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}
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/**
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* 返回缺失的权限
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*
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* @param context
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* @param permissions
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* @return 返回缺少的权限，null 意味着没有缺少权限
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*/
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public static String[] getDeniedPermissions(Context context, String[] permissions) {
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//Android M 以上申请权限
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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ArrayList<String> deniedPermissionList = new ArrayList<>();
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for (String permission : permissions) {
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//权限未许可则记录权限
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if (context.checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
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deniedPermissionList.add(permission);
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}
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}
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int size = deniedPermissionList.size();
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//返回String数组权限
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if (size > 0) {
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return deniedPermissionList.toArray(new String[deniedPermissionList.size()]);
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}
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}
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return null;
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}
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// 判断权限集合 是否授权 false授权 true未授权
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public boolean lacksPermissions(String... permissions) {
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for (String permission : permissions) {
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if (lacksPermission(permission)) {
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return true;
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}
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}
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return false;
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}
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// 判断是否缺少权限
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private boolean lacksPermission(String permission) {
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//权限未授权
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return ContextCompat.checkSelfPermission(mActivity, permission) == PackageManager.PERMISSION_DENIED;
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}
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/**
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* 弹出权限请求通知框(更具需求 不需要知道了弹窗直接弹权限申请)
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*/
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public void showNormalDialog() {
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requestPermissions();//开始请求权限。
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}
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/**
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* 弹出权限设置通知框
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*/
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public void showSettingDialog() {
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AlertDialog dialog = new AlertDialog.Builder(mActivity).setTitle("温馨提示").setMessage("权限已被拒绝如要正常使用，请设置相关权限").setNegativeButton("不用了", new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int which) {
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dialog.dismiss();
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}
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}).setPositiveButton("去设置", new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int which) {
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startAppSettings();//打开设置
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dialog.dismiss();
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}
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}).create();
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dialog.show();
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}
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private static final String PACKAGE_URL_SCHEME = "package:"; // 方案
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// 启动应用的设置
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private void startAppSettings() {
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Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
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intent.setData(Uri.parse(PACKAGE_URL_SCHEME + mActivity.getPackageName()));
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mActivity.startActivity(intent);
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}
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}
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