二维码扫描 制作二维码

MainActivity

package com.code.qrcode;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.uuzuche.lib_zxing.activity.CaptureActivity;
import com.uuzuche.lib_zxing.activity.CodeUtils;

/**
 * --------------- 二维码扫描 --------------------
 * 实现步骤
 *   1. 在module中添加依赖
 *    2.在application中进行初始化(清单文件要注册)
 *    3.在清单文件中添加依赖
 *    4.根据点击事件调用扫描二维码的界面操作
 *    5.在动态接收跳转页面传过来的结果,进行吐司
 */


public class MainActivity extends AppCompatActivity {

    private EditText editText;
    private ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        editText = findViewById(R.id.editText);
        imageView = findViewById(R.id.imageView);

    }

    /**
     * 简单的二维码,加载默认二维码扫码界面
     * @param view
     */

    public void ZXing(View view) {
        Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
        startActivityForResult(intent, 0);
    }

    /**
     * 生成带logo二维码
     * @param view
     */
    public void logoma(View view) {
        String textContent = editText.getText().toString();
        if (TextUtils.isEmpty(textContent)) {
            Toast.makeText(MainActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();
            return;
        }
        editText.setText("");
        Bitmap mBitmap = CodeUtils.createImage(textContent, 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
        imageView.setImageBitmap(mBitmap);
    }

    /**
     * 生成不带logo二维码
     * @param view
     */
    public void NOlogoma(View view){
        String textContent = editText.getText().toString();
        if (TextUtils.isEmpty(textContent)) {
            Toast.makeText(MainActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();
            return;
        }
        editText.setText("");
        Bitmap mBitmap = CodeUtils.createImage(textContent, 400, 400, null);
        imageView.setImageBitmap(mBitmap);
    }

    /**
     * 测试生成二维码图片
     * @param requestCode
     * @param resultCode
     * @param data
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 0) {
            //处理扫描结果（在界面上显示）
            if (null != data) {
                Bundle bundle = data.getExtras();
                if (bundle == null) {
                    return;
                }
                if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {
                    String result = bundle.getString(CodeUtils.RESULT_STRING);
                    Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();
                } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {
                    Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();
                }
            }
        }

    }
}

自定义类MyApplication

package com.code.qrcode;

import android.app.Application;

import com.uuzuche.lib_zxing.activity.ZXingLibrary;

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        ZXingLibrary.initDisplayOpinion(this);
    }
}

布局文件

<?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=".MainActivity"
    android:orientation="vertical"
    >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="ZXing"
        android:text="简单的二维码,加载默认二维码扫码界面" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="logoma"
        android:text="生成带logo二维码" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="NOlogoma"
        android:text="生成不带logo二维码" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="测试生成二维码图片" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

在清单文件注册MyApplication , 添加所需要的权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.code.qrcode">

    <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" />

    <application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

在Gradle文件中 添加依赖 以及解决V4包与V7包冲突的问题

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28

    defaultConfig {
        applicationId "com.code.qrcode"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        }


    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    //解决V4包 与 V7包冲突的问题
    configurations.all {
        resolutionStrategy.eachDependency { DependencyResolveDetails details ->
            def requested = details.requested
            if (requested.group == 'com.android.support') {
                if (!requested.name.startsWith("multidex")) {
                    details.useVersion '28.0.0'
                }
            }
        }
    }
}


dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    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'


}