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

  1 package com.dragon.android.permissionrequest;  2   3 import android.Manifest;  4 import android.content.DialogInterface;  5 import android.content.Intent;  6 import android.content.pm.PackageManager;  7 import android.net.Uri;  8 import android.os.Build;  9 import android.os.Bundle; 10 import android.provider.Settings; 11 import android.support.annotation.NonNull; 12 import android.support.v4.app.ActivityCompat; 13 import android.support.v4.content.ContextCompat; 14 import android.support.v7.app.AlertDialog; 15 import android.support.v7.app.AppCompatActivity; 16 import android.widget.Toast; 17  18 public class MainActivity extends AppCompatActivity { 19  20     // 要申请的权限 21     private String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE}; 22     private AlertDialog dialog; 23  24     @Override 25     protected void onCreate(Bundle savedInstanceState) { 26         super.onCreate(savedInstanceState); 27         setContentView(R.layout.activity_main); 28  29         // 版本判断。当手机系统大于 23 时，才有必要去判断权限是否获取 30         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 31  32             // 检查该权限是否已经获取 33             int i = ContextCompat.checkSelfPermission(this, permissions[0]); 34             // 权限是否已经 授权 GRANTED---授权  DINIED---拒绝 35             if (i != PackageManager.PERMISSION_GRANTED) { 36                 // 如果没有授予该权限，就去提示用户请求 37                 showDialogTipUserRequestPermission(); 38             } 39         } 40     } 41  42     // 提示用户该请求权限的弹出框 43     private void showDialogTipUserRequestPermission() { 44  45         new AlertDialog.Builder(this) 46                 .setTitle("存储权限不可用") 47                 .setMessage("由于支付宝需要获取存储空间，为你存储个人信息；\n否则，您将无法正常使用支付宝") 48                 .setPositiveButton("立即开启", new DialogInterface.OnClickListener() { 49                     @Override 50                     public void onClick(DialogInterface dialog, int which) { 51                         startRequestPermission(); 52                     } 53                 }) 54                 .setNegativeButton("取消", new DialogInterface.OnClickListener() { 55                     @Override 56                     public void onClick(DialogInterface dialog, int which) { 57                         finish(); 58                     } 59                 }).setCancelable(false).show(); 60     } 61  62     // 开始提交请求权限 63     private void startRequestPermission() { 64         ActivityCompat.requestPermissions(this, permissions, 321); 65     } 66  67     // 用户权限 申请 的回调方法 68     @Override 69     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 70         super.onRequestPermissionsResult(requestCode, permissions, grantResults); 71  72         if (requestCode == 321) { 73             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 74                 if (grantResults[0] != PackageManager.PERMISSION_GRANTED) { 75                     // 判断用户是否 点击了不再提醒。(检测该权限是否还可以申请) 76                     boolean b = shouldShowRequestPermissionRationale(permissions[0]); 77                     if (!b) { 78                         // 用户还是想用我的 APP 的 79                         // 提示用户去应用设置界面手动开启权限 80                         showDialogTipUserGoToAppSettting(); 81                     } else 82                         finish(); 83                 } else { 84                     Toast.makeText(this, "权限获取成功", Toast.LENGTH_SHORT).show(); 85                 } 86             } 87         } 88     } 89  90     // 提示用户去应用设置界面手动开启权限 91  92     private void showDialogTipUserGoToAppSettting() { 93  94         dialog = new AlertDialog.Builder(this) 95                 .setTitle("存储权限不可用") 96                 .setMessage("请在-应用设置-权限-中，允许支付宝使用存储权限来保存用户数据") 97                 .setPositiveButton("立即开启", new DialogInterface.OnClickListener() { 98                     @Override 99                     public void onClick(DialogInterface dialog, int which) {100                         // 跳转到应用设置界面101                         goToAppSetting();102                     }103                 })104                 .setNegativeButton("取消", new DialogInterface.OnClickListener() {105                     @Override106                     public void onClick(DialogInterface dialog, int which) {107                         finish();108                     }109                 }).setCancelable(false).show();110     }111 112     // 跳转到当前应用的设置界面113     private void goToAppSetting() {114         Intent intent = new Intent();115 116         intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);117         Uri uri = Uri.fromParts("package", getPackageName(), null);118         intent.setData(uri);119 120         startActivityForResult(intent, 123);121     }122 123     //124     @Override125     protected void onActivityResult(int requestCode, int resultCode, Intent data) {126         super.onActivityResult(requestCode, resultCode, data);127         if (requestCode == 123) {128 129             if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {130                 // 检查该权限是否已经获取131                 int i = ContextCompat.checkSelfPermission(this, permissions[0]);132                 // 权限是否已经 授权 GRANTED---授权  DINIED---拒绝133                 if (i != PackageManager.PERMISSION_GRANTED) {134                     // 提示用户应该去应用设置界面手动开启权限135                     showDialogTipUserGoToAppSettting();136                 } else {137                     if (dialog != null && dialog.isShowing()) {138                         dialog.dismiss();139                     }140                     Toast.makeText(this, "权限获取成功", Toast.LENGTH_SHORT).show();141                 }142             }143         }144     }145 }