实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.zbar.lib; import java.io.IOException; import android.app.Activity; import android.content.res.AssetFileDescriptor; import android.graphics.Point; 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.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.animation.Animation; import android.view.animation.LinearInterpolator; import android.view.animation.ScaleAnimation; import android.widget.ImageView; import android.widget.RelativeLayout; import android.widget.Toast; import com.zbar.lib.camera.CameraManager; import com.zbar.lib.decode.CaptureActivityHandler; import com.zbar.lib.decode.InactivityTimer; /** * 作者: 陈涛(1076559197@qq.com) * * 时间: 2014年5月9日 下午12:25:31 * * 版本: V_1.0.0 * * 描述: 扫描界面 */ public class CaptureActivity extends Activity implements Callback { private CaptureActivityHandler handler; private boolean hasSurface; private InactivityTimer inactivityTimer; private MediaPlayer mediaPlayer; private boolean playBeep; private static final float BEEP_VOLUME = 0.50f; private boolean vibrate; private int x = 0; private int y = 0; private int cropWidth = 0; private int cropHeight = 0; private RelativeLayout mContainer = null; private RelativeLayout mCropLayout = null; public int getX() { return x; } public void setX(int x) { this.x = x; } public int getY() { return y; } public void setY(int y) { this.y = y; } public int getCropWidth() { return cropWidth; } public void setCropWidth(int cropWidth) { this.cropWidth = cropWidth; } public int getCropHeight() { return cropHeight; } public void setCropHeight(int cropHeight) { this.cropHeight = cropHeight; } /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_qr_scan); // 初始化 CameraManager CameraManager.init(getApplication()); hasSurface = false; inactivityTimer = new InactivityTimer(this); mContainer = (RelativeLayout) findViewById(R.id.capture_containter); mCropLayout = (RelativeLayout) findViewById(R.id.capture_crop_layout); ImageView mQrLineView = (ImageView) findViewById(R.id.capture_scan_line); ScaleAnimation animation = new ScaleAnimation(1.0f, 1.0f, 0.0f, 1.0f); animation.setRepeatCount(-1); animation.setRepeatMode(Animation.RESTART); animation.setInterpolator(new LinearInterpolator()); animation.setDuration(1200); mQrLineView.startAnimation(animation); } boolean flag = true; protected void light() { if (flag == true) { flag = false; // 开闪光灯 CameraManager.get().openLight(); } else { flag = true; // 关闪光灯 CameraManager.get().offLight(); } } @SuppressWarnings("deprecation") @Override protected void onResume() { super.onResume(); SurfaceView surfaceView = (SurfaceView) findViewById(R.id.capture_preview); SurfaceHolder surfaceHolder = surfaceView.getHolder(); if (hasSurface) { initCamera(surfaceHolder); } else { surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } 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.get().closeDriver(); } @Override protected void onDestroy() { inactivityTimer.shutdown(); super.onDestroy(); } public void handleDecode(String result) { inactivityTimer.onActivity(); playBeepSoundAndVibrate(); Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT) .show(); // 连续扫描,不发送此消息扫描一次结束后就不能再次扫描 handler.sendEmptyMessage(R.id.restart_preview); } private void initCamera(SurfaceHolder surfaceHolder) { try { CameraManager.get().openDriver(surfaceHolder); Point point = CameraManager.get().getCameraResolution(); int width = point.y; int height = point.x; int x = mCropLayout.getLeft() * width / mContainer.getWidth(); int y = mCropLayout.getTop() * height / mContainer.getHeight(); int cropWidth = mCropLayout.getWidth() * width / mContainer.getWidth(); int cropHeight = mCropLayout.getHeight() * height / mContainer.getHeight(); setX(x); setY(y); setCropWidth(cropWidth); setCropHeight(cropHeight); } catch (IOException ioe) { return; } catch (RuntimeException e) { return; } if (handler == null) { handler = new CaptureActivityHandler(CaptureActivity.this); } } @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 Handler getHandler() { return handler; } private void initBeepSound() { if (playBeep && mediaPlayer == null) { setVolumeControlStream(AudioManager.STREAM_MUSIC); mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setOnCompletionListener(beepListener); AssetFileDescriptor file = getResources().openRawResourceFd( R.raw.beep); try { mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength()); file.close(); mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME); mediaPlayer.prepare(); } catch (IOException e) { 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); } } private final OnCompletionListener beepListener = new OnCompletionListener() { public void onCompletion(MediaPlayer mediaPlayer) { mediaPlayer.seekTo(0); } }; }
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