Android开发_ZXing库二维码应用

Android二维码扫描应用

ZXing库精简版的下载：http://download.csdn.net/detail/a874508605/8546185

布局文件的编写

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/container"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <Button        android:id="@+id/scan"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="开始扫描二维码" />    <TextView        android:id="@+id/text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="show" /></LinearLayout>

在AndroidManifest.xml文件中声明相应的Activity

 <activity     android:name="com.zxing.activity.CaptureActivity"     android:configChanges="orientation|keyboardHidden"     android:screenOrientation="portrait"     android:theme="@android:style/Theme.NoTitleBar.Fullscreen"     android:windowSoftInputMode="stateAlwaysHidden" > </activity>

需要用到的权限

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

相应实现的源码

<span style="font-size:14px;">public class MainActivity extends Activity {private Button scanButton;private TextView text;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);scanButton = (Button) findViewById(R.id.scan);text = (TextView) findViewById(R.id.text);scanButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {Toast.makeText(MainActivity.this, "你写可以扫描条形码或者二维码", Toast.LENGTH_SHORT).show();Intent  startScan = new Intent(MainActivity.this, CaptureActivity.class);startActivityForResult(startScan, 0);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == RESULT_OK) {String result = data.getExtras().getString("result");text.setText(result);}}</span><span style="font-size:14px;">}</span>

Android生成二维码应用 布局文件的编写

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/container"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent">   <EditText        android:id="@+id/input"       android:layout_width="fill_parent"       android:layout_height="wrap_content"       android:hint="请输入要编码的内容"       />   <Button        android:id="@+id/gen"       android:layout_width="fill_parent"       android:layout_height="wrap_content"       android:text="生成二维码"       />   <ImageView        android:id="@+id/img"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_gravity="center_horizontal"       /></LinearLayout>

相应实现的源码

public class MainActivity extends Activity {private EditText input;private Button genButton;private ImageView img;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);input = (EditText) findViewById(R.id.input);genButton = (Button) findViewById(R.id.gen);img = (ImageView) findViewById(R.id.img);genButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {String in = input.getText().toString();if(in.equals("")){Toast.makeText(MainActivity.this, "请输入文本", Toast.LENGTH_SHORT).show();}else {try {Bitmap qrcode = EncodingHandler.createQRCode(in, 400);img.setImageBitmap(qrcode);} catch (WriterException e) {e.printStackTrace();}}}});}}