实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.example.watercamera; import java.io.IOException; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.PixelFormat; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.os.Bundle; import android.os.Environment; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.LayoutInflater; import android.view.Surface; import android.view.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ImageView; import com.example.erweimascan.MyApplication; import com.example.erweimascan.R; import com.example.watercamera.util.SystemMethod; public class WaterCameraActivity extends Activity { private Context mContext; private ImageView mBack; private SurfaceView mSurfaceView; private ImageView mCamera_sd; private ImageView mTackPic; private ViewPager mViewPager; private Camera camera; private Camera.Parameters parameters = null; private List<View> views = new ArrayList<View>(); private int waterType = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.waterphoto_camera); mContext = this; findView(); init(); } private void findView() { mBack = (ImageView) findViewById(R.id.back); mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView); mCamera_sd = (ImageView) findViewById(R.id.camera_sd); mTackPic = (ImageView) findViewById(R.id.tack_pic); mViewPager = (ViewPager) findViewById(R.id.viewPager); } private void init() { mSurfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mSurfaceView.getHolder().setFixedSize(176, 144);// surfaceView 分辨率 mSurfaceView.getHolder().setKeepScreenOn(true); mSurfaceView.getHolder().addCallback(new MySurfaceViewCallback()); mTackPic.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (camera != null) { camera.takePicture(null, null, new MyPictureCallback()); } } }); // viewPager LayoutInflater inflater = LayoutInflater.from(mContext); views.add(inflater.inflate(R.layout.water_camera_page1, null)); views.add(inflater.inflate(R.layout.water_camera_page2, null)); views.add(inflater.inflate(R.layout.water_camera_page3, null)); views.add(inflater.inflate(R.layout.water_camera_page4, null)); views.add(inflater.inflate(R.layout.water_camera_page5, null)); mViewPager.setAdapter(new MyViewPagerAdapter()); mViewPager.setOnPageChangeListener(new MyOnPagerChangeListener()); } private class MyPictureCallback implements PictureCallback { @Override public void onPictureTaken(byte[] data, Camera camera) { String photoName = System.currentTimeMillis() ".jpg"; // String // path=Environment.getExternalStorageDirectory() "/waterphoto/" photoName; // int result = SystemMethod.saveBitmap(path, data); ((MyApplication)getApplication()).setBitmap(BitmapFactory.decodeByteArray(data, 0, data.length)); Intent intent = new Intent(mContext, WaterPhotoActivity.class); intent.putExtra("waterType", waterType); startActivityForResult(intent, 0); } } private class MySurfaceViewCallback implements Callback { @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { parameters = camera.getParameters();// 设置相机参数 parameters.setPictureFormat(PixelFormat.JPEG); parameters.setPreviewSize(width, height);// 预览大小 parameters.setPreviewFrameRate(5);// 帧 parameters.setPictureSize(width, height);// 保存图片大小 parameters.setJpegQuality(80);// 图片质量 } @Override public void surfaceCreated(SurfaceHolder holder) { try { camera = Camera.open(); camera.setPreviewDisplay(holder); camera.setDisplayOrientation(getPreviewDegree(WaterCameraActivity.this)); camera.startPreview(); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { if (camera != null) { camera.release(); camera = null; } } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (camera != null) { camera.startPreview(); } } @Override protected void onDestroy() { super.onDestroy(); if (camera != null) { camera.release(); camera = null; } } public static int getPreviewDegree(Activity activity) { // 获得手机的方向 int rotation = activity.getWindowManager().getDefaultDisplay().getRotation(); int degree = 0; // 根据手机的方向计算相机预览画面应该选择的角度 switch (rotation) { case Surface.ROTATION_0: degree = 90; break; case Surface.ROTATION_90: degree = 0; break; case Surface.ROTATION_180: degree = 270; break; case Surface.ROTATION_270: degree = 180; break; } return degree; } // //////////////////////////////////////////////////////////////////// // viewPager private class MyViewPagerAdapter extends PagerAdapter { @Override public int getCount() { return views.size(); } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0 == arg1; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView(views.get(position)); } @Override public Object instantiateItem(ViewGroup container, int position) { container.addView(views.get(position)); return views.get(position); } } private class MyOnPagerChangeListener implements OnPageChangeListener { @Override public void onPageScrollStateChanged(int arg0) { } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageSelected(int arg0) { waterType = arg0; } } }
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