相機

建立 View

camera.xml

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<SurfaceView

android:id="@+id/surfaceView1"

android:layout_width="match_parent"

android:layout_height="match_parent" />

</LinearLayout>

建立 Java

CameraView.java

package tw.com.shopingmemu.View;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import tw.com.shopingmemu.R;

import android.app.Activity;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Matrix;

import android.graphics.PixelFormat;

import android.hardware.Camera;

import android.hardware.Camera.AutoFocusCallback;

import android.hardware.Camera.PictureCallback;

import android.os.Bundle;

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.Window;

import android.view.WindowManager;

import android.widget.Toast;

public class CameraView extends Activity implements OnClickListener, Callback,

AutoFocusCallback {

private final String FILE_PATH = "/ShopingMemu";

private final String SD_PATH = android.os.Environment

.getExternalStorageDirectory().getAbsolutePath();

private File myFilePath;

boolean isClicked = false;

SurfaceView mySurfaceView;

SurfaceHolder holder;

Camera myCamera;

private int prodcutSerial;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 去除程式標題

requestWindowFeature(Window.FEATURE_NO_TITLE);

// 去除手機狀態列

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

WindowManager.LayoutParams.FLAG_FULLSCREEN);

this.setContentView(R.layout.camera);

Bundle extras = getIntent().getExtras();

prodcutSerial = extras.getInt("prodcutSerial");

myFilePath = new File(SD_PATH + FILE_PATH + "/" + prodcutSerial

+ ".jpg");

// 取的SurfaceView物件

mySurfaceView = (SurfaceView) findViewById(R.id.surfaceView1);

// 取得Holder

holder = mySurfaceView.getHolder();

// 添加回傳

holder.addCallback(this);

// 設置類型

holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

// 設置監聽

mySurfaceView.setOnClickListener(this);

}

@Override

public void onClick(View v) {

if (!isClicked) {

myCamera.autoFocus(this);// 自動對焦

isClicked = true;

} else {

Intent intent = new Intent();

CameraView.this.setResult(RESULT_OK, intent);

finish();

}

// 建立jpeg圖片

PictureCallback jpeg = new PictureCallback() {

@Override

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

try {// 取得圖片

BitmapFactory.Options options = new BitmapFactory.Options();

options.inSampleSize = 10;

// 旋轉90度

Bitmap bm = BitmapFactory.decodeByteArray(data, 0, data.length,

options);

int width = bm.getWidth();

int height = bm.getHeight();

Matrix matrix = new Matrix();

matrix.postScale(width, height);

matrix.setRotate(90);

Bitmap newbm = Bitmap.createBitmap(bm, 0, 0, width, height,

matrix, true);

// 釋放Bitmap佔用資源

bm.recycle();

bm = null;

File file = new File(myFilePath.getAbsolutePath());

BufferedOutputStream bos = new BufferedOutputStream(

new FileOutputStream(file));

newbm.compress(Bitmap.CompressFormat.JPEG, 100, bos);// 將圖片壓縮

bos.flush();// 輸出

bos.close();// 關閉

// 釋放Bitmap佔用資源

newbm.recycle();

newbm = null;

Toast.makeText(CameraView.this, "儲存圖片", Toast.LENGTH_LONG)

.show();

surfaceDestroyed(holder);

} catch (Exception e) {

e.printStackTrace();

}

};

@Override

/**

* 當surfaceView發生改變後使用

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

// 設置參數並開始預覽

// 建構Camera.Parameters對相機的參數進行設置

Camera.Parameters params = myCamera.getParameters();

// 設置拍照的圖片格式

params.setPictureFormat(PixelFormat.JPEG);

// 設置Preview的尺寸

// 只可以選擇(176*144,320*240,352*288,480*360,640*480)

params.setPreviewSize(640, 480);

// 設置相機採用Parameters

myCamera.setParameters(params);

// 開始預覽

myCamera.startPreview();

}

@Override

/**

* 當Surface被建立後使用

public void surfaceCreated(SurfaceHolder holder) {

// 開啟相機

if (myCamera == null) {

myCamera = Camera.open();

try {

myCamera.setPreviewDisplay(holder);

} catch (IOException e) {

e.printStackTrace();

}

@Override

/**

* 當SurfaceView被停用時使用

public void surfaceDestroyed(SurfaceHolder holder) {

// 關閉預覽並釋放資源

if (myCamera != null) {

myCamera.stopPreview();

myCamera.release();

myCamera = null;

}

Intent intent = new Intent();

CameraView.this.setResult(RESULT_OK, intent);

finish();

}

@Override

/**

* 自動對焦

public void onAutoFocus(boolean success, Camera camera) {

if (success) {

// 設置參數，並拍照

Camera.Parameters params = myCamera.getParameters();

params.setPictureFormat(PixelFormat.JPEG);

params.setPreviewSize(640, 480);

myCamera.setParameters(params);

myCamera.takePicture(null, null, jpeg);

}

設定權限

<uses-permission android:name="android.permission.CAMERA" />

<uses-feature android:name="android.hardware.camera.autofocus" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />