我写了一个简单的代码来拍摄照片,然后使用ImageView将其显示到屏幕上。然而,有一些内存泄漏,我没有发现。(拍照后内存由7mb变为39mb)
public class MainActivity extends Activity {
public String gl;
ImageView viewImage;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b = (Button) findViewById(R.id.myButton);
viewImage = (ImageView) findViewById(R.id.myImageView);
}
public void launchCamera(View view) {//Button onClick method
Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg");
gl = f.getAbsolutePath();
i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(i, 1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK) {
Bitmap bitmap;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmap = BitmapFactory.decodeFile(gl, bitmapOptions);
viewImage.setImageBitmap(bitmap);
}
}
}
链接:
https://stackoverflow.com/a/32245332/3702862其中我给出了有效的方法从Camera
拍摄照片,然后在ImageView
中显示。
图片在内存中可以是巨大的,每个像素占用32位内存。
您应该加载图像的缩小版本,而不是完整尺寸。我甚至很惊讶你没有得到一个错误加载超过2048*2048像素的图像