android 拍照+拍照button 以及返回按钮布局

浏览数：25 / 时间：2015年06月11日

公司最近做一个项目拍照总是崩溃，所以决定自己写一个拍照的方法，在网上调研一番，写了一个简单demo，现共享如下

主要CameraActivity

CameraActivity

package com.wondertek.video.camera;

import java.io.FileOutputStream;

import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;

import com.wondertek.xsgj.R;
/**
 * 

 * @Description:TODO 拍照优化

 * @author:skyCc

 * @time:2014-6-6 下午5:03:10
 */
public class CameraActivity extends Activity {

    public static final int CAMERA_RESULT = 1234;
    public static final int REQUEST_PICKER_ALBUM = 2345;
    private static String TAG = "CameraObserver";
    public static String photopath = "";
    Button buttonExit;
    Button buttonCapture;
    private Camera mCamera;
    private CameraViewNew mPreview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // CameraObserver已经将photopath路径传过来了
        Log.d(TAG, "CameraActivity onCreate photopath = " + photopath);
        getWindow().clearFlags(
                WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.capture_activity);
        mCamera = getCameraInstance();
        // 创建预览类，并与Camera关联，最后添加到界面布局中
        mPreview = new CameraViewNew(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
        preview.addView(mPreview);
        // requestWindowFeature(Window.FEATURE_NO_TITLE);// 设置横屏模式以及全屏模式
        // setContentView(new CameraView(this,photopath)); //设置View
        buttonCapture = (Button) findViewById(R.id.button_capture);
        buttonCapture.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                mCamera.autoFocus(new AutoFocusCallback() {
                    @Override
                    public void onAutoFocus(boolean success, Camera camera) {
                        // TODO Auto-generated method stub
                        mCamera.takePicture(null, null, myPicture);

                    }
                });
            }

        });
        buttonExit=(Button) findViewById(R.id.button_exit);
        buttonExit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                finish();
            }
        });
    }

    /** 打开一个Camera */
    public static Camera getCameraInstance() {
        Camera c = null;
        try {
            c = Camera.open();
        } catch (Exception e) {
            Log.d(TAG, "打开Camera失败失败");
        }
        return c;
    }

    private PictureCallback myPicture = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            // TODO Auto-generated method stub
            Log.d(TAG, " onPictureTaken = " + photopath);
            try {
                if (photopath.length() > 0)
                    data2file(data, photopath);
            } catch (Exception e) {
            }
            camera.stopPreview();

        }

        private void data2file(byte[] w, String fileName) throws Exception {// 将二进制数据转换为文件的函数
            FileOutputStream out = null;
            try {
                out = new FileOutputStream(fileName);
                out.write(w);
                out.close();
            } catch (Exception e) {
                if (out != null)
                    out.close();
                throw e;
            }
        }
    };
}

CameraViewNew

package com.wondertek.video.camera;

import java.io.IOException;

import org.jivesoftware.smack.sasl.SASLMechanism.Success;

import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.SurfaceHolder.Callback;

/**

 * @Description:TODO重新布局拍照的界面

 * @author:skyCc

 * @time:2014-6-5 下午11:33:11

 */

public class CameraViewNew extends SurfaceView implements Callback{
private final static String TAG="CameraView";
private Camera mCamera;
private SurfaceHolder mHolder;
    public CameraViewNew(Context context,Camera camera) {
        super(context);
        mCamera=camera;
        mHolder=getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // TODO Auto-generated method stub
        if(mHolder.getSurface()==null){
            return ;
        }
        mCamera.stopPreview();
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        mCamera.setPreviewCallback(null);
        mCamera.stopPreview();
        mCamera.release();
        mCamera =null;
    }
}

capture_activity.xm

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="horizontal"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     >
    <FrameLayout
     android:id="@+id/camera_preview"
     android:layout_width="fill_parent"
    android:layout_height="fill_parent"
   android:layout_weight="1"
     />
   <Button
    android:id="@+id/button_capture"
     android:text="拍照"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     android:layout_gravity="center"
    />
   <Button   
        android:text="返回"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:id="@+id/button_exit" 
        android:layout_gravity="center" 
    />  
 </LinearLayout>