QR code encoder

标签：qrcode

(qrcode_java0.50beta10.tar\qrcode_java0.50beta10\qrcode_java0.50beta10\lib\Qrcode.jar)

2. Code:

package com.qrcode.encoder.qrcodeencoder;

import java.io.UnsupportedEncodingException;

import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

import com.swetake.util.Qrcode;

public class MainActivity extends Activity implements SurfaceHolder.Callback{
	
	private final static String TAG = "QRCode";
	
	private SurfaceView mSurfaceView;
	private SurfaceHolder mSurfaceHolder;
	
	private EditText mEtInput;
	private Button mBtnEncode;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		Log.e(TAG, "onCreate");
		DisplayMetrics mDisplayMetrics = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(mDisplayMetrics);
		
		mSurfaceView = (SurfaceView)findViewById(R.id.sv_qrcode);
		mSurfaceHolder = mSurfaceView.getHolder();
		mSurfaceHolder.addCallback(this);
		
		mEtInput = (EditText)findViewById(R.id.et_input);
		
		mBtnEncode = (Button)findViewById(R.id.btn_encode);
		mBtnEncode.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View arg0) {
				Log.e(TAG, "mBtnEncode onClick");
				encodeQR(mEtInput.getText().toString(), 7);
			}
		});
		
	}

	protected void encodeQR(String str, int version) {
		Log.e(TAG, "encodeQR");
		
		Qrcode mQrcode = new Qrcode();
		mQrcode.setQrcodeErrorCorrect('M');
		mQrcode.setQrcodeEncodeMode('B');
		mQrcode.setQrcodeVersion(version);
		
		try {
			byte[] bytesEncoding = str.getBytes("utf-8");
			
			if(bytesEncoding.length>0 && bytesEncoding.length<120){
				boolean[][] bEncoding = mQrcode.calQrcode(bytesEncoding);
				drawQRCode(bEncoding, Color.BLACK);
			}
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}

	private void drawQRCode(boolean[][] bRect, int colorFill) {
		Log.e(TAG, "drawQRCode");
		
		int mPadding = 40;
		
		int mLength = 20;
		
		Canvas mCanvas = mSurfaceHolder.lockCanvas();
		mCanvas.drawColor(Color.WHITE);

		Paint mPaint = new Paint();
		mPaint.setStyle(Paint.Style.FILL);
		mPaint.setColor(colorFill);
		mPaint.setStrokeWidth(1.0F);
		
		for(int i=0;i<bRect.length;i++){
			for(int j=0;j<bRect.length;j++){
				if(bRect[j][i]){
					mCanvas.drawRect(
							new Rect(
									mPadding+j*mLength,
									mPadding+i*mLength,
									mPadding+j*mLength+mLength,
									mPadding+i*mLength+mLength
							), mPaint);
				}
			}
		}
		mSurfaceHolder.unlockCanvasAndPost(mCanvas);
	}

	@Override
	public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
		Log.e(TAG, "surfaceChanged");
	}

	@Override
	public void surfaceCreated(SurfaceHolder arg0) {
		Log.e(TAG, "surfaceCreated");
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder arg0) {
		Log.e(TAG, "surfaceDestroyed");
	}
}

<RelativeLayout 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"
    tools:context="${relativePackage}.${activityClass}" >

    <EditText
    	android:id="@+id/et_input"
    	android:layout_alignParentTop="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="" />
        
    <SurfaceView
    	android:id="@+id/sv_qrcode"
    	android:layout_below="@id/et_input"
    	android:layout_centerHorizontal="true"
    	android:layout_centerVertical="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <Button 
        android:id="@+id/btn_encode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="@string/encode"/>

</RelativeLayout>

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="14" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".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>
    </application>

</manifest>

QR code encoder

标签：qrcode

原文地址：http://blog.csdn.net/torvalbill/article/details/42553311