SurfaceView与Camera制作照相机

1.Activity：

package com.ccas.roadsideconnect;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

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.Matrix;

import android.graphics.PixelFormat;

import android.hardware.Camera;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageButton;

import android.widget.LinearLayout;

public class Takephotos extends Activity {

private CameraView cv;

private String photoPath;

private Camera mCamera = null;

public Camera.PictureCallback pictureCallback = new Camera.PictureCallback() {

public void onPictureTaken(byte[] data, Camera camera) {

Bitmap mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

// Matrix matrix = new Matrix();

// matrix.postScale(0.05f, 0.05f);

// Bitmap newBitmap=Bitmap.createBitmap(mBitmap, 0, 0, mBitmap.getWidth(), mBitmap.getHeight(), matrix, true);

File myCaptureFile = new File(getFilesDir(), photoPath);

try {

BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(

myCaptureFile));

mBitmap.compress(Bitmap.CompressFormat.PNG, 100, os);

os.flush();

os.close();

resetCamera();

Intent intent = new Intent();

intent.putExtra("photopath", myCaptureFile.getPath());

setResult(RESULT_OK, intent);

finish();

} catch (IOException e) {

e.printStackTrace();

} finally {

if (mBitmap != null) {

mBitmap.recycle();

}

}

}

};

//reret Camera

private void resetCamera() {

if (mCamera != null) {

mCamera.stopPreview();

mCamera.release();

mCamera = null;

}

}

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

getWindow().setFormat(PixelFormat.TRANSLUCENT);

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

setContentView(R.layout.takephoto);

// cv = new CameraView(this);

// FrameLayout fl = new FrameLayout(this);

// fl.addView(cv);

// setContentView(fl);

LinearLayout ll=(LinearLayout) findViewById(R.id.cameralayout);

cv = new CameraView(this);

ll.addView(cv);

Bundle extras=getIntent().getExtras();

if(extras!=null){

if(extras.getString("driver")!=null){

photoPath=extras.getString("driver");

}

else if(extras.getString("truck")!=null){

photoPath=extras.getString("truck");

}

}

//

ImageButton take=(ImageButton) findViewById(R.id.take);

take.getBackground().setAlpha(100);

take.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if (mCamera != null) {

mCamera.takePicture(null, null, pictureCallback);

}

}

});

// ImageButton cancel=(ImageButton) findViewById(R.id.cancel);

// cancel.setOnClickListener(new OnClickListener() {

//

// @Override

// public void onClick(View v) {

// finish();

// }

// });

}

public boolean onKeyDown(int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {

if (mCamera != null) {

mCamera.takePicture(null, null, pictureCallback);

}

} if(keyCode==KeyEvent.KEYCODE_BACK){

finish();

}

return cv.onKeyDown(keyCode, event);

}

/*

* (non-Javadoc)

* @see android.app.Activity#onPause()

*/

@Override

protected void onPause() {

super.onPause();

resetCamera();

}

// set the Camera

class CameraView extends SurfaceView {

private SurfaceHolder holder = null;

public CameraView(Context context) {

super(context);

holder = this.getHolder();

holder.addCallback(new SurfaceHolder.Callback() {

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

mCamera = Camera.open();

try {

mCamera.setPreviewDisplay(holder);

} catch (IOException e) {

mCamera.release();

mCamera = null;

}

}

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

Camera.Parameters parameters = mCamera.getParameters();

// Set images format

parameters.setPictureFormat(PixelFormat.JPEG);

// set Preview size

// WindowManager manager=(WindowManager) getSystemService(Context.WIFI_SERVICE);

// Display display=manager.getDefaultDisplay();

// parameters.setPreviewSize(320, 480);

// parameters.setPreviewSize(display.getWidth(), display.getHeight());

//set automatic focus

// parameters.setFocusMode(Parameters.FOCUS_MODE_AUTO);

// Setting the picture the resolution of the preservation size

//parameters.setPictureSize(320, 240);

// set the data of Camera

mCamera.setParameters(parameters);

// start preview

mCamera.startPreview();

}

});

holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}

}

}

2.布局文件

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent" android:layout_height="fill_parent"

android:orientation="vertical">

<LinearLayout android:layout_width="wrap_content"

android:layout_height="wrap_content" android:id="@+id/cameralayout" />

<LinearLayout android:layout_width="fill_parent"

android:layout_height="wrap_content" android:orientation="horizontal"

android:gravity="bottom|center" android:layout_gravity="bottom|center">

<ImageButton android:id="@+id/take" android:src="@drawable/takephoto"

android:layout_width="100dp" android:layout_height="50dp" />

<!--

<ImageButton android:id="@+id/cancel" android:src="@drawable/takephoto"

android:layout_width="100dp" android:layout_height="50dp" />

-->

</LinearLayout>

</FrameLayout>