View view = LayoutInflater.from(context).inflate(R.layout.resource, null);
就像这样,我如果多次创建View,但是layout是同一个,那么LayoutInflater会多次解析XML文件吗?还是解析了一次就记住了?
解决方案
应该是会多次解析,影响性能
public class MainActivity extends Activity { private static final String TAG = MainActivity.class.getSimpleName(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void buttonClick(View v){ long startTime = System.currentTimeMillis(); for (int i = 0, length = 1000; i < length; i++) { View view = LayoutInflater.from(this).inflate(R.layout.activity_main, null); } Log.i(TAG, "during time = " + (System.currentTimeMillis() - startTime)); }}
源代码里没有看到做缓存。
然后我写了个demo测试,1000次调用耗时1699ms, 100次调用耗时188ms