拍照并获取图片

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

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File("/sdcard/test.jpg")));  
startActivityForResult(intent, 1);  

@Override  
    protected void onActivityResult(int requestCode, int resultCode, Intent data)  
    {  
        if (requestCode == 1)  
        {  
            if (resultCode == Activity.RESULT_OK)  
            {  
            　　　　Bitmap cameraBitmap = decodeBitmp("/sdcard/test.jpg"); 
　　　　　　　　　 imageView.setImageBitmap(cameraBitmap); 
　　　　　　　　　　// 存成320*240和50*50 如果是垂直方向，需要对cameraBitmap旋转90度 
　　　　　　　　　　//MediaStore.Images.Media.insertImage(getContentResolver(), cameraBitmap, null, null); } } 
　　　　　　　　　　　super.onActivityResult(requestCode, resultCode, data); }

public static final float DISPLAY_WIDTH = 200;
public static final float DISPLAY_HEIGHT = 200;
/**
 * 从path中获取图片信息
 * @param path
 * @return
 */
private Bitmap decodeBitmap(String path){
  BitmapFactory.Options op = new BitmapFactory.Options();
  //inJustDecodeBounds 
  //If set to true, the decoder will return null (no bitmap), but the out…
  op.inJustDecodeBounds = true;
  Bitmap bmp = BitmapFactory.decodeFile(path, op); //获取尺寸信息
  //获取比例大小
  int wRatio = (int)Math.ceil(op.outWidth/DISPLAY_WIDTH);
  int hRatio = (int)Math.ceil(op.outHeight/DISPLAY_HEIGHT);
  //如果超出指定大小，则缩小相应的比例
  if(wRatio > 1 && hRatio > 1){
    if(wRatio > hRatio){
      op.inSampleSize = wRatio;
    }else{
      op.inSampleSize = hRatio;
    }
  }
  op.inJustDecodeBounds = false;
  bmp = BitmapFactory.decodeFile(path, op);
  return bmp;
}