<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 = ne