二维码的实现

最新推荐文章于 2024-01-30 15:31:43 发布

原创最新推荐文章于 2024-01-30 15:31:43 发布 · 296 阅读

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CC 4.0 BY-SA版权

本文介绍了一个简单的Android应用程序，该程序可以生成带有或不带Logo的二维码，并能够进行二维码扫描识别。用户可以通过输入文本来生成二维码，并选择是否在二维码中加入Logo。

MainActivity

package com.bwie.test.erweimagongcheng;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

import com.xys.libzxing.zxing.activity.CaptureActivity;
import com.xys.libzxing.zxing.encoding.EncodingUtils;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class MainActivity extends AppCompatActivity {
    @BindView(R.id.scan)
    Button scan;
    @BindView(R.id.tv_ruselt)
    TextView tvRuselt;
    @BindView(R.id.et_text)
    EditText etText;
    @BindView(R.id.make)
    Button make;
    @BindView(R.id.is_logo)
    CheckBox isLogo;
    @BindView(R.id.img)
    ImageView img;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

    }

    @OnClick({R.id.scan, R.id.make})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            /*扫描二维码*/
            case R.id.scan:
                startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class),0);
                break;
            /*生成二维码*/
            case R.id.make:
                String input=etText.getText().toString().trim();
                //生成二维码，然后为二维码增加logo
                Bitmap bitmap= EncodingUtils.createQRCode(input,500,500,
                        isLogo.isChecked()? BitmapFactory.decodeResource(getResources(),
                                R.mipmap.ic_launcher):null
                );
                img.setImageBitmap(bitmap);
                break;
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //Log.i("TAG","resultCode: "+resultCode+" result_ok: "+RESULT_OK);
        if (resultCode==RESULT_OK){
            Bundle bundle=data.getExtras();
            String result= bundle.getString("result");
            tvRuselt.setText(result);

        } if(resultCode == RESULT_CANCELED) {
            tvRuselt.setText("扫描出错");
        }
    }
}

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.bwie.test.erweimagongcheng.MainActivity">

    <Button
        android:id="@+id/scan"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="开始扫描"
        />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Ruselt"
        android:textSize="26sp"/>

    <TextView
        android:id="@+id/tv_ruselt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="26sp"/>
    <EditText
        android:id="@+id/et_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:id="@+id/make"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="生成二维码"/>
    <CheckBox
        android:id="@+id/is_logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="check"/>
    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"
        android:layout_gravity="center"/>
</LinearLayout>