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;
}