今天学习做个扫一扫 于是就上百度找找前人的作品,终于找到了,于是就开始搞
我使用的是 最新的android Studio
Android Studio 3.1.2
Build #AI-173.4720617, built on April 14, 2018
JRE: 1.8.0_152-release-1024-b02 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
想做的APP样子是: A界面中有个按钮。点击之后跳到扫一扫B界面,扫完了之后,回调到A界面,在A界面弹一个toast
首先 引用:
在build.gradle中的dependencies 添加一句话 implementation ‘cn.yipianfengye.android:zxing-library:2.2‘
如果其他版本的Android Studio 引入报错 就使用 compile引用 。
dependencies { implementation fileTree(dir: ‘libs‘, include: [‘*.jar‘]) implementation ‘com.android.support:appcompat-v7:27.1.1‘ implementation ‘com.android.support.constraint:constraint-layout:1.1.0‘ testImplementation ‘junit:junit:4.12‘ androidTestImplementation ‘com.android.support.test:runner:1.0.2‘ androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2‘ implementation ‘cn.yipianfengye.android:zxing-library:2.2‘ }
demo中 一共有 三个 layout 两个 class 一张图 我命名为 scan 定义了一个颜色资源
1、打开 colors.xml 添加资源
<item name="scan_color">#ffffff</item>
2、复制图片 scan.png到drawable
3、动手搞A界面
名字activity_camera.xml 布局为:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".QR"> <Button android:id="@+id/bt_QR" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="扫描二维码" /> </LinearLayout>
QR class代码:
package com.example.administrator.qr; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; import com.uuzuche.lib_zxing.activity.CodeUtils; import java.nio.charset.CoderResult; public class QR extends AppCompatActivity { @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(requestCode ==1){ if(data!=null){ Bundle bundle = data.getExtras(); if(bundle==null){ return ; } if(bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_SUCCESS){ String ret = bundle.getString(CodeUtils.RESULT_STRING); Toast.makeText(this, "扫码成功,结果:"+ret, Toast.LENGTH_SHORT).show(); } } } super.onActivityResult(requestCode, resultCode, data); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_qr); Button button = findViewById(R.id.bt_QR); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(QR.this,Camera.class); startActivityForResult(intent,1); } }); } }
4、开始搞B界面
名字 activity_camera.xml 布局代码:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".Camera"> <FrameLayout android:id="@+id/myCamera" android:layout_width="match_parent" android:layout_height="match_parent"> </FrameLayout> <Button android:id="@+id/bt_back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="返回" /> <Button android:id="@+id/bt_kaideng" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="false" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:text="打开闪光灯" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/bt_back" android:layout_alignParentTop="true" android:layout_alignTop="@+id/bt_back" android:layout_centerHorizontal="true" android:gravity="fill_vertical" android:text="扫一扫" android:textColor="@color/encode_view" android:textSize="24sp" /> </RelativeLayout>
再弄一个布局 用于替换原始扫一扫的那正方形窗口,如图所示:
名字 camera.xml 布局为:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="fill_parent" android:layout_height="fill_parent"> <SurfaceView android:id="@+id/preview_view" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <com.uuzuche.lib_zxing.view.ViewfinderView android:id="@+id/viewfinder_view" android:layout_width="wrap_content" android:layout_height="wrap_content" app:inner_corner_color="@color/scan_corner_color" //这个是扫一扫四个角的颜色 app:inner_corner_length="30dp" app:inner_corner_width="2dp" //这个是扫一扫 四个角的粗细 app:inner_height="200dp" app:inner_margintop="150dp" app:inner_scan_bitmap="@drawable/scan" //这个是扫一扫那条线 app:inner_scan_iscircle="false" app:inner_scan_speed="50" //这个是那条线 从上往下的速度 app:inner_width="200dp" /> </FrameLayout>
//这个布局中的id不能更改 否则报空指针
// com.uuzuche.lib_zxing.view.ViewfinderView标签可以根据需要修改
Camera class 代码为:
package com.example.administrator.qr; import android.content.Intent; import android.graphics.Bitmap; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.WindowManager; import com.uuzuche.lib_zxing.activity.CaptureFragment; import com.uuzuche.lib_zxing.activity.CodeUtils; public class Camera extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getSupportActionBar().hide(); getWindow().setFlags(WindowManager.LayoutParams.ALPHA_CHANGED, WindowManager.LayoutParams.ALPHA_CHANGED); setContentView(R.layout.activity_camera);// Log.d("bug", "onCreate: "+1); CaptureFragment captureFragment = new CaptureFragment(); Log.d("bug", "onCreate: "+2); CodeUtils.setFragmentArgs(captureFragment,R.layout.camera); //设置自定义扫码界面 captureFragment.setAnalyzeCallback(analyzeCallback); Log.d("bug", "onCreate: "+3); //R.id.fl_zxing_container 对应 setContentView 布局中的 Fragment getSupportFragmentManager().beginTransaction().replace(R.id.myCamera, captureFragment).commit(); // 替换setContenView设置的布局中的 ID为myCamera } CodeUtils.AnalyzeCallback analyzeCallback = new CodeUtils.AnalyzeCallback() { @Override public void onAnalyzeSuccess(Bitmap mBitmap, String result) { Intent resultIntent = new Intent(); Bundle bundle = new Bundle(); bundle.putInt(CodeUtils.RESULT_TYPE, CodeUtils.RESULT_SUCCESS); bundle.putString(CodeUtils.RESULT_STRING, result); resultIntent.putExtras(bundle); Camera.this.setResult(RESULT_OK, resultIntent); Camera.this.finish(); } @Override public void onAnalyzeFailed() { Intent resultIntent = new Intent(); Bundle bundle = new Bundle(); bundle.putInt(CodeUtils.RESULT_TYPE, CodeUtils.RESULT_FAILED); bundle.putString(CodeUtils.RESULT_STRING, ""); resultIntent.putExtras(bundle); Camera.this.setResult(RESULT_OK, resultIntent); Camera.this.finish(); } }; }
最后添加权限
<uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.FLASHLIGHT" /> <uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> <uses-permission android:name="android.permission.VIBRATE" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.INTERNET" />
声明界面
<activity android:name="com.example.administrator.qr.Camera">
原文地址:https://www.cnblogs.com/MYDoraemon/p/9112487.html