安卓史上最简单扫描二维码和生成二维码

public class MainActivity extends Activity {

private Button button;
private TextView text;

private Button genButton;
private ImageView img;
private EditText input;

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

button = (Button) findViewById(R.id.button);
text = (TextView) findViewById(R.id.text);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplication(), "你可以扫描二维码", 0).show();
Intent startScan = new Intent(MainActivity.this,CaptureActivity.class);
startActivityForResult(startScan,0);
}
});

genButton = (Button) findViewById(R.id.gen);
img = (ImageView) findViewById(R.id.img);
input = (EditText) findViewById(R.id.input);
genButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
String inputStr = input.getText().toString().trim();
try {
if(!TextUtils.isEmpty(inputStr)){
Bitmap qrcode = EncodingHandler.createQRCode(inputStr, 400);
img.setImageBitmap(qrcode);
}
} catch (WriterException e) {
e.printStackTrace();
}
}
});
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 0 && resultCode == RESULT_OK){
String result = data.getExtras().getString("result");
text.setText(result);
}
}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android1="http://schemas.android.com/apk/res/android"
    android1:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    >


    <Button
        android1:id="@+id/button"
        android1:layout_width="match_parent"
        android1:layout_height="wrap_content"
        android1:text="扫描二维码" />

    <TextView 
        android1:id="@+id/text"
        android1:layout_width="match_parent"
        android1:layout_height="wrap_content"
        android:layout_below="@id/button"
        />
    
    <EditText 
        android1:id="@+id/input"
        android1:layout_width="match_parent"
        android1:layout_height="wrap_content"
        android:layout_below="@id/text"
        android:hint="请输入要编码的内容"
        />
    
    <Button
        android1:id="@+id/gen"
        android1:layout_width="match_parent"
        android1:layout_height="wrap_content"
        android1:text="生成二维码" 
        android:layout_below="@id/input"
        />
    
    <ImageView
        android1:id="@+id/img"
        android1:layout_width="wrap_content"
        android1:layout_height="wrap_content"
        android:layout_below="@id/gen"
        android:layout_gravity="center"
        />
    
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.wxj.activity"
    android:versionCode="1"
    android:versionName="1.0" >


    <uses-sdk
        android:minSdkVersion="8"
         />
    
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission android:name="android.permission.FLASHLIGHT"/>
    


    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.wxj.activity.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />


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


</manifest>

源码下载地址:http://download.csdn.net/detail/u010648159/8933563