实现二维码的扫描和生成

二维码现在越来越火爆，使用的越发广泛，对于二维码二维码的生成与解析，有多种途径

具体操作实现步骤看这篇博客

二维码的详细介绍

Android6.0版本以上的权限管理

危险权限管理

首先添加zxing的依赖

compile 'cn.yipianfengye.android:zxing-library:2.1'

各种权限

<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" />

在Application中执行初始化操作

public class MyApp extends Application {
@Override
public void onCreate() {
super.onCreate();
// 初始化Zxing包
ZXingLibrary.initDisplayOpinion(this);
}
}

提示：在清单文件中注册Application

主页面布局

<?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"
android:orientation="vertical"
tools:context="com.bwie.zxing_dome.MainActivity">

<Button
android:id="@+id/smbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/smtext" />

<Button
android:id="@+id/scbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/sctext" />

<EditText
android:id="@id/mtextstring"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

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

</LinearLayout>

主界面

public class MainActivity extends AppCompatActivity {

private View mScbut, mSmbut;
public static final String TAG = "MainActivity";
private EditText mEdittext;
private ImageView mImage;

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

mScbut = findViewById(R.id.scbutton);
mSmbut = findViewById(R.id.smbutton);
mEdittext = findViewById(R.id.mtextstring);
mImage = findViewById(R.id.mimage);

/**
* Android6.0危险权限
*/
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
// 申请WRITE_EXTERNAL_STORAGE权限
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},
1);
}
/**
* 扫描二维码
*/
this.mSmbut.setOnClickListener(new View.OnClickListener() {
public static final int REQUEST_COME = 5;

@Override
public void <
4000
span class="hljs-title">onClick(View v) {
Log.d(TAG, "onClick：");
Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
startActivityForResult(intent, REQUEST_COME);
}
});

/**
* 生成二维码
*/
mScbut.setOnClickListener(new View.OnClickListener() {
public Bitmap mBitmap;

@Override
public void onClick(View v) {
Log.d(TAG, "onClick：");
String textContent = mEdittext.getText().toString();
if (TextUtils.isEmpty(textContent)) {
Toast.makeText(MainActivity.this, "您的输入为空！", Toast.LENGTH_SHORT).show();
return;
}
mEdittext.setText("");
mBitmap = CodeUtils.createImage(textContent, 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
mImage.setImageBitmap(mBitmap);
}
});
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 5) {
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();

Intent intent = new Intent(MainActivity.this, WebActivity.class);
intent.putExtra("path", result);
startActivity(intent);

} 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();
}
}
}
}
}

生成二维码扫描传值到第二个Activity

public class WebActivity extends AppCompatActivity {

private WebView mWeb;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web);

String mpath = getIntent().getStringExtra("path");
mWeb = findViewById(R.id.mwebview);
if (mpath != null) {
mWeb.loadUrl(mpath);
}
}
}

<WebView
android:id="@+id/mwebview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />