开发一个相机应用，需要申请三个权限：相机、读文件、写文件。
1、在AndroidManifest.xml中添加
|
1
2
3
|
<uses-permission android:name="android.permission.CAMERA"/><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> |
2、新建一个Permission类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
public class Permission { public static final int REQUEST_CODE = 5; //定义三个权限 private static final String[] permission = new String[]{ Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, }; //每个权限是否已授 public static boolean isPermissionGranted(Activity activity){ if(Build.VERSION.SDK_INT >= 23){ for(int i = 0; i < permission.length;i++) { int checkPermission = ContextCompat.checkSelfPermission(activity,permission[i]); /*** * checkPermission返回两个值 * 有权限: PackageManager.PERMISSION_GRANTED * 无权限: PackageManager.PERMISSION_DENIED */ if(checkPermission != PackageManager.PERMISSION_GRANTED){ return false; } } return true; }else{ return true; } } public static boolean checkPermission(Activity activity){ if(isPermissionGranted(activity)) { return true; } else { //如果没有设置过权限许可，则弹出系统的授权窗口 ActivityCompat.requestPermissions(activity,permission,REQUEST_CODE); return false; } }} |
3、在MainActivity中加入授权操作
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
@Override protected void onStart() { super.onStart(); Permission.checkPermission(this); } @Override protected void onResume() { super.onResume(); if(Permission.isPermissionGranted(this)) { Log.i("PERMISSION","请求权限成功"); } } |
初步授权成功
4、在MainActivity中处理授权失败结果，拒绝授权则退出应用
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
@Overridepublic void onRequestPermissionsResult( int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == Permission.REQUEST_CODE) { for (int grantResult : grantResults) { if (grantResult != PackageManager.PERMISSION_GRANTED) { Log.e("Permission","授权失败！"); // 授权失败，退出应用 this.finish(); return; } } }} |
效果图
到此这篇关于Android申请相机权限和读写权限实例的文章就介绍到这了,更多相关Android申请相机权限内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！
原文链接：https://blog.csdn.net/jignjingfan/article/details/122857224
