Android开发之二维码功能实现

今天是“女神节”，公司给女同事的福利是一束鲜花+红包+小礼品+晚上免费的自助餐，还有半天假！作为码农的我只能看着，然后笑一笑。继续我的代码。言归正传，今天给大家带来的是Zxing,来实现扫一扫功能，和生成二维码。先上效果图： 1，在project的build.gradle添加如下代码(如下图)：

allprojects { repositories { jcenter() maven { url "https://jitpack.io" } } }

2，在app/build.gradle文件中添加：

compile 'com.github.open-android:Zxing:v1.0.3'

3，添加相应的权限：

<uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <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.FLASHLIGHT" />

4，main.xml布局：

<?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:orientation="vertical" tools:context="com.classical.example_zxing.MainActivity"> <EditText android:id="@+id/edt_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入内容" /> <Button android:id="@+id/btn_create" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="生成二维码" /> <Button android:id="@+id/btn_scan" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="扫码（支持识别相册二维码）" /> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp"> <ImageView android:id="@+id/iv_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:visibility="gone" /> <TextView android:id="@+id/tv_hint" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="扫描返回bitmap" android:textColor="#f00" /> </RelativeLayout> <TextView android:id="@+id/tv_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#ffff00"/> </LinearLayout>

5，如何在代码中使用:

package com.classical.example_zxing; import android.content.Intent; import android.graphics.Bitmap; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.google.zxing.activity.CaptureActivity; import com.google.zxing.common.BitmapUtils; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private EditText mContent; private Button mCreate,mScan; private ImageView mImage; private final static int REQ_CODE = 1028; private TextView mHint; private TextView mResult; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { mContent = (EditText)findViewById(R.id.edt_content); mCreate = (Button)findViewById(R.id.btn_create); mScan = (Button)findViewById(R.id.btn_scan); mImage = (ImageView)findViewById(R.id.iv_image); mHint = (TextView)findViewById(R.id.tv_hint); mResult = (TextView)findViewById(R.id.tv_result); mCreate.setOnClickListener(this); mScan.setOnClickListener(this); } @Override public void onClick(View view) { switch (view.getId()) { case R.id.btn_create : //生成二维码 String content = mContent.getText().toString().trim(); Bitmap bitmap = null; try { bitmap = BitmapUtils.create2DCode(content); mImage.setVisibility(View.VISIBLE); mHint.setVisibility(View.GONE); mImage.setImageBitmap(bitmap); }catch (Exception e) { e.printStackTrace(); } break; case R.id.btn_scan : //扫码 Intent intent = new Intent(MainActivity.this, CaptureActivity.class); startActivityForResult(intent,REQ_CODE); break; default: break; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQ_CODE) { mImage.setVisibility(View.VISIBLE); mContent.setVisibility(View.GONE); String result = data.getStringExtra(CaptureActivity.SCAN_QRCODE_RESULT); Bitmap bitmap = data.getParcelableExtra(CaptureActivity.SCAN_QRCODE_BITMAP); mResult.setText("扫描结果为：" + result); showToast("扫码结果："+result); if (bitmap != null) { mImage.setImageBitmap(bitmap); } } } private void showToast(String msg) { Toast.makeText(MainActivity.this, "" + msg, Toast.LENGTH_SHORT).show(); } }

小结：开发工具使用AS，然后就很容易去实现扫二维码；今天是女神节嘛！然后我也准备的一个二维码送给心中的那个她！你成功的也可以扫一扫哦！