Google Android SDK开发范例大全——示例代码

package irdc.ex10_05; import java.util.regex.Matcher; import java.util.regex.Pattern; import jp.sourceforge.qrcode.QRCodeDecoder; import jp.sourceforge.qrcode.data.QRCodeImage; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.pm.ActivityInfo; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.PixelFormat; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.hardware.Camera.ShutterCallback; import android.net.Uri; 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.Window; import android.view.ViewGroup.LayoutParams; import android.webkit.URLUtil; import android.widget.Button; import android.widget.ImageView; import android.widget.Toast; public class EX10_05 extends Activity implements SurfaceHolder.Callback { /* 创建私有Camera对象 */ private Camera mCamera01; private Button mButton01, mButton02, mButton03; /* 作为review照下来的相片之用 */ private ImageView mImageView01; private String TAG = "HIPPO"; private SurfaceView mSurfaceView01; private SurfaceHolder mSurfaceHolder01; /* 默认相机预览模式为false */ private boolean bIfPreview = false; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* 使应用程序全屏幕运行，不使用title bar */ requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); /* 添加红色正方形红框View，供User对准条形码 */ DrawCaptureRect mDraw = new DrawCaptureRect ( EX10_05.this, 110, 10, 100, 100, getResources().getColor(R.drawable.lightred) ); /* 将创建的红色方框添加至此Activity中 */ addContentView ( mDraw, new LayoutParams ( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT ) ); /* 取得屏幕解析像素 */ DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); mImageView01 = (ImageView) findViewById(R.id.myImageView1); /* 以SurfaceView作为相机Preview之用 */ mSurfaceView01 = (SurfaceView) findViewById(R.id.mSurfaceView1); /* 绑定SurfaceView，取得SurfaceHolder对象 */ mSurfaceHolder01 = mSurfaceView01.getHolder(); /* Activity必须实现SurfaceHolder.Callback */ mSurfaceHolder01.addCallback(EX10_05.this); /* 额外的设置预览大小设置，在此不使用 */ //mSurfaceHolder01.setFixedSize(320, 240); /* * 以SURFACE_TYPE_PUSH_BUFFERS(3) * 作为SurfaceHolder显示类型 * */ mSurfaceHolder01.setType (SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mButton01 = (Button)findViewById(R.id.myButton1); mButton02 = (Button)findViewById(R.id.myButton2); mButton03 = (Button)findViewById(R.id.myButton3); /* 打开相机及预览二维条形码 */ mButton01.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub /* 自定义初始化打开相机函数 */ initCamera(); } }); /* 停止预览 */ mButton02.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub /* 自定义重置相机，并关闭相机预览函数 */ resetCamera(); } }); /* 拍照QR Code二维条形码 */ mButton03.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub /* 自定义拍照函数 */ takePicture(); } }); } /* 自定义初始相机函数 */ private void initCamera() { if(!bIfPreview) { /* 若相机非在预览模式，则打开相机 */ mCamera01 = Camera.open(); } if (mCamera01 != null && !bIfPreview) { Log.i(TAG, "inside the camera"); /* 创建Camera.Parameters对象 */ Camera.Parameters parameters = mCamera01.getParameters(); /* 设置相片格式为JPEG */ parameters.setPictureFormat(PixelFormat.JPEG); /* 指定preview的屏幕大小 */ parameters.setPreviewSize(160, 120); /* 设置图片分辨率大小 */ parameters.setPictureSize(160, 120); /* 将Camera.Parameters设置予Camera */ mCamera01.setParameters(parameters); /* setPreviewDisplay唯一的参数为SurfaceHolder */ mCamera01.setPreviewDisplay(mSurfaceHolder01); /* 立即运行Preview */ mCamera01.startPreview(); bIfPreview = true; } } /* 拍照撷取图像 */ private void takePicture() { if (mCamera01 != null && bIfPreview) { /* 调用takePicture()方法拍照 */ mCamera01.takePicture (shutterCallback, rawCallback, jpegCallback); } } /* 相机重置 */ private void resetCamera() { if (mCamera01 != null && bIfPreview) { mCamera01.stopPreview(); /* 扩展学习，释放Camera对象 */ //mCamera01.release(); mCamera01 = null; bIfPreview = false; } } private ShutterCallback shutterCallback = new ShutterCallback() { public void onShutter() { // Shutter has closed } }; private PictureCallback rawCallback = new PictureCallback() { public void onPictureTaken(byte[] _data, Camera _camera) { // TODO Handle RAW image data } }; private PictureCallback jpegCallback = new PictureCallback() { public void onPictureTaken(byte[] _data, Camera _camera) { // TODO Handle JPEG image data try { /* onPictureTaken传入的第一个参数即为相片的byte */ Bitmap bm = BitmapFactory.decodeByteArray(_data, 0, _data.length); int resizeWidth = 160; int resizeHeight = 120; float scaleWidth = ((float) resizeWidth) / bm.getWidth(); float scaleHeight = ((float) resizeHeight) / bm.getHeight(); Matrix matrix = new Matrix(); /* 使用Matrix.postScale方法缩小 Bitmap Size*/ matrix.postScale(scaleWidth, scaleHeight); /* 创建新的Bitmap对象 */ Bitmap resizedBitmap = Bitmap.createBitmap (bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true); /* 撷取4:3图片的居中红色框部分100x100像素 */ Bitmap resizedBitmapSquare = Bitmap.createBitmap (resizedBitmap, 30, 10, 100, 100); /* 将拍照的图文件以ImageView显示出来 */ mImageView01.setImageBitmap(resizedBitmapSquare); /* 将传入的图文件译码成字符串 */ String strQR2 = decodeQRImage(resizedBitmapSquare); if(strQR2!="") { if (URLUtil.isNetworkUrl(strQR2)) { /* OMIA规范，网址条形码，打开浏览器上网 */ mMakeTextToast(strQR2, true); Uri mUri = Uri.parse(strQR2); Intent intent = new Intent(Intent.ACTION_VIEW, mUri); startActivity(intent); } else if(eregi("wtai://",strQR2)) { /* OMIA规范，手机拨打电话格式 */ String[] aryTemp01 = strQR2.split("wtai://"); Intent myIntentDial = new Intent ( "android.intent.action.CALL", Uri.parse("tel:"+aryTemp01[1]) ); startActivity(myIntentDial); } else if(eregi("TEL:",strQR2)) { /* OMIA规范，手机拨打电话格式 */ String[] aryTemp01 = strQR2.split("TEL:"); Intent myIntentDial = new Intent ( "android.intent