Android 拍照
示例
向AndroidManifest文件添加访问摄像头的权限：
<uses-permission android:name="android.permission.CAMERA"></uses-permission> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Xml文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<SurfaceView android:id="@+id/surfaceView" android:layout_height="0dip" android:layout_width="0dip"></SurfaceView>
<ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/imageView"></ImageView>
</LinearLayout>活动
import java.io.IOException;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.ImageView;
public class TakePicture extends Activity implementsSurfaceHolder.Callback
{
//一个变量，用于在main.xml文件中存储对“图像视图”的引用
private ImageView iv_image;
//用于在main.xml文件中存储对Surface视图的引用的变量
private SurfaceView sv;
//位图以显示捕获的图像
private Bitmap bmp;
//相机变量
//表面支架
private SurfaceHolder sHolder;
//控制相机的变量
private Camera mCamera;
//相机参数
private Parameters parameters;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//在main.xml文件中获取图像视图
iv_image = (ImageView) findViewById(R.id.imageView);
//在main.xml文件中获取Surface视图
sv = (SurfaceView) findViewById(R.id.surfaceView);
//取得表面
sHolder = sv.getHolder();
//将下面定义的回调接口方法添加为SurfaceView回调
sHolder.addCallback(this);
//告诉Android，该表面会不断替换其数据
sHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)
{
//获取相机参数
parameters = mCamera.getParameters();
//设置相机参数
mCamera.setParameters(parameters);
mCamera.startPreview();
//设置拍摄照片后应执行的代码
Camera.PictureCallbackmCall = new Camera.PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
//将摄像机获取的数据解码为位图
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
String filename=Environment.getExternalStorageDirectory()
+File.separator+ "testimage.jpg";
FileOutputStream out = null;
try {
out = new FileOutputStream(filename);
bmp.compress(Bitmap.CompressFormat.PNG, 100, out); //bmp是您的Bitmap实例
//PNG是一种无损格式，压缩因子(100)被忽略
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
//设置iv_image
iv_image.setImageBitmap(bmp);
}
};
mCamera.takePicture(null, null, mCall);
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
//Surface已创建，获取相机并告诉它在哪里
//绘制预览。
mCamera = Camera.open();
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException exception) {
mCamera.release();
mCamera = null;
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
//停止预览
mCamera.stopPreview();
//释放相机
mCamera.release();
//将相机与该对象解除绑定
mCamera = null;
}
}