安卓手机版本在6.0以后需要动态获取相机权限
1.获取相机权限
1
2
3
|
<!-- 获取手机相机的权限 --> <uses-permission android:name= "android.permission.CAMERA" /> <uses-permission android:name= "android.permission.FLASHLIGHT" /> |
2.添加依赖
implementation 'cn.yipianfengye.android:zxing-library:2.2'
3.activity_main.xml
1
2
3
4
5
6
7
8
9
10
11
12
13
|
<?xml version= "1.0" encoding= "utf-8" ?> <LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android" android:layout_width= "wrap_content" android:layout_gravity= "center" android:layout_height= "wrap_content" > <Button android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "开启相机扫描" android:id= "@+id/btn" /> </LinearLayout> |
4.MainActivity.java
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
package com.example.a86156.saomiao; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Build; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Toast; import com.uuzuche.lib_zxing.activity.CaptureActivity; import com.uuzuche.lib_zxing.activity.CodeUtils; import com.uuzuche.lib_zxing.activity.ZXingLibrary; public class MainActivity extends AppCompatActivity { Button btn; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); //隐藏系统默认的标题 ActionBar actionBar = getSupportActionBar(); if (actionBar!= null ){ actionBar.hide(); } //初始化相机权限 ZXingLibrary.initDisplayOpinion( this ); btn = findViewById(R.id.btn); btn.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { //先判断手机版本是否在6.0以上,如果在6.0以上则需要动态申请权限 if (Build.VERSION.SDK_INT > 22 ) { if (ContextCompat.checkSelfPermission(MainActivity. this , android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { //先判断有没有权限 ,没有就在这里进行权限的申请 ActivityCompat.requestPermissions(MainActivity. this , new String[]{android.Manifest.permission.CAMERA}, 1 ); } else { //说明已经获取到摄像头权限了 想干嘛干嘛 Intent intent = new Intent(MainActivity. this , CaptureActivity. class ); startActivityForResult(intent, 1 ); } } else { //这个说明系统版本在6.0之下,不需要动态获取权限。 Intent intent = new Intent(MainActivity. this , CaptureActivity. class ); startActivityForResult(intent, 1 ); } } }); } //获取手机相机权限 @Override public void onRequestPermissionsResult( int requestCode, @NonNull String[] permissions, @NonNull int [] grantResults) { super .onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == 1 ) { if (grantResults[ 0 ] == PackageManager.PERMISSION_GRANTED) { Intent intent = new Intent( this , CaptureActivity. class ); startActivityForResult(intent, 1 ); } else { Toast.makeText(MainActivity. this , "请打开相机权限" , Toast.LENGTH_SHORT).show(); } } } //处理扫描结果 @Override protected void onActivityResult( int requestCode, int resultCode, Intent data) { super .onActivityResult(requestCode, resultCode, data); if (resultCode == RESULT_OK) { if (data != null ) { Bundle bundle = data.getExtras(); if (bundle == null ) { return ; } if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) { //获取到扫描的结果 String result = bundle.getString(CodeUtils.RESULT_STRING); Log.d( "res:" ,result); } } } } } |
总结
以上所述是小编给大家介绍的Android studio 实现手机扫描二维码功能,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
如果你觉得本文对你有帮助,欢迎转载,烦请注明出处,谢谢!
原文链接:https://blog.csdn.net/le9406/article/details/102682627