实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.zxing.android; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.Vector; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.res.AssetFileDescriptor; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.media.AudioManager; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle; import android.os.Handler; import android.os.Vibrator; import android.view.KeyEvent; import android.view.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.WindowManager; import com.google.zxing.BarcodeFormat; import com.google.zxing.Result; import com.zxing.android.camera.CameraManager; import com.zxing.android.decoding.CaptureActivityHandler; import com.zxing.android.decoding.InactivityTimer; import com.zxing.android.view.ViewfinderView; public class CaptureActivity extends Activity implements Callback { public static final String QR_RESULT = "RESULT"; private CaptureActivityHandler handler; private ViewfinderView viewfinderView; private SurfaceView surfaceView; private boolean hasSurface; private Vector<BarcodeFormat> decodeFormats; private String characterSet; private InactivityTimer inactivityTimer; private MediaPlayer mediaPlayer; private boolean playBeep; // private static final float BEEP_VOLUME = 0.10f; private boolean vibrate; CameraManager cameraManager; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); /* * this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, * WindowManager.LayoutParams.FLAG_FULLSCREEN);// 去掉信息栏 * * RelativeLayout layout = new RelativeLayout(this); * layout.setLayoutParams(new * ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, * LayoutParams.FILL_PARENT)); * * this.surfaceView = new SurfaceView(this); this.surfaceView * .setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, * LayoutParams.FILL_PARENT)); * * layout.addView(this.surfaceView); * * this.viewfinderView = new ViewfinderView(this); * this.viewfinderView.setBackgroundColor(0x00000000); * this.viewfinderView.setLayoutParams(new * ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, * LayoutParams.FILL_PARENT)); layout.addView(this.viewfinderView); * * TextView status = new TextView(this); RelativeLayout.LayoutParams * params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, * LayoutParams.WRAP_CONTENT); * params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); * params.addRule(RelativeLayout.CENTER_HORIZONTAL); * status.setLayoutParams(params); * status.setBackgroundColor(0x00000000); * status.setTextColor(0xFFFFFFFF); status.setText("请将条码置于取景框内扫描。"); * status.setTextSize(14.0f); * * layout.addView(status); setContentView(layout); */ setContentView(R.layout.activity_capture); surfaceView = (SurfaceView) findViewById(R.id.surfaceview); viewfinderView = (ViewfinderView) findViewById(R.id.viewfinderview); Window window = getWindow(); window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); hasSurface = false; inactivityTimer = new InactivityTimer(this); } @Override protected void onResume() { super.onResume(); if (getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); } // CameraManager.init(getApplication()); cameraManager = new CameraManager(getApplication()); viewfinderView.setCameraManager(cameraManager); SurfaceHolder surfaceHolder = surfaceView.getHolder(); if (hasSurface) { initCamera(surfaceHolder); } else { surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } decodeFormats = null; characterSet = null; playBeep = true; AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE); if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) { playBeep = false; } initBeepSound(); vibrate = true; } @Override protected void onPause() { super.onPause(); if (handler != null) { handler.quitSynchronously(); handler = null; } cameraManager.closeDriver(); } @Override protected void onDestroy() { inactivityTimer.shutdown(); super.onDestroy(); } private void initCamera(SurfaceHolder surfaceHolder) { try { // CameraManager.get().openDriver(surfaceHolder); cameraManager.openDriver(surfaceHolder); } catch (IOException ioe) { return; } catch (RuntimeException e) { return; } if (handler == null) { handler = new CaptureActivityHandler(this, decodeFormats, characterSet); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceCreated(SurfaceHolder holder) { if (!hasSurface) { hasSurface = true; initCamera(holder); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { hasSurface = false; } public CameraManager getCameraManager() { return cameraManager; } public ViewfinderView getViewfinderView() { return viewfinderView; } public Handler getHandler() { return handler; } public void drawViewfinder() { viewfinderView.drawViewfinder(); } public void handleDecode(Result obj, Bitmap barcode) { inactivityTimer.onActivity(); playBeepSoundAndVibrate(); showResult(obj, barcode); } private void showResult(final Result rawResult, Bitmap barcode) { AlertDialog.Builder builder = new AlertDialog.Builder(this); Drawable drawable = new BitmapDrawable(barcode); builder.setIcon(drawable); builder.setTitle("类型:" rawResult.getBarcodeFormat() "\n 结果:" rawResult.getText()); builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); Intent intent = new Intent(); intent.putExtra("result", rawResult.getText()); setResult(RESULT_OK, intent); finish(); } }); builder.setNegativeButton("重新扫描", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); restartPreviewAfterDelay(0L); } }); builder.setCancelable(false); builder.show(); // Intent intent = new Intent(); // intent.putExtra(QR_RESULT, rawResult.getText()); // setResult(RESULT_OK, intent); // finish(); } public void restartPreviewAfterDelay(long delayMS) { if (handler != null) { handler.sendEmptyMessageDelayed(MessageIDs.restart_preview, delayMS); } } private void initBeepSound() { if (playBeep && mediaPlayer == null) { // The volume on STREAM_SYSTEM is not adjustable, and users found it // too loud, // so we now play on the music stream. setVolumeControlStream(AudioManager.STREAM_MUSIC); mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setOnCompletionListener(beepListener); try { AssetFileDescriptor fileDescriptor = getAssets().openFd("qrbeep.ogg"); this.mediaPlayer.setDataSource(fileDescriptor.getFileDescriptor(), fileDescriptor.getStartOffset(), fileDescriptor.getLength()); this.mediaPlayer.setVolume(0.1F, 0.1F); this.mediaPlayer.prepare(); } catch (IOException e) { this.mediaPlayer = null; } } } private static final long VIBRATE_DURATION = 200L; private void playBeepSoundAndVibrate() { if (playBeep && mediaPlayer != null) { mediaPlayer.start(); } if (vibrate) { Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); vibrator.vibrate(VIBRATE_DURATION); } } /** * When the beep has finished playing, rewind to queue up another one. */ private final OnCompletionListener beepListener = new OnCompletionListener() { public void onCompletion(MediaPlayer mediaPlayer) { mediaPlayer.seekTo(0); } }; @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { setResult(RESULT_CANCELED); finish(); return true; } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) { return true; } return super.onKeyDown(keyCode, event); } }
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