Android实现SwipeRefreshLayout首次进入自动刷新
作者:RaphetS
这篇文章主要为大家详细介绍了Android实现SwipeRefreshLayout首次进入自动刷新,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
看到了Android版知乎实现了这种效果,就自己也实现了一下。
先来一张效果图
实现方式:
方法一:
①在onWindowFocusChanged()方法中,设置为刷新状态为true
@Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); mSwipeRefreshLayout.setRefreshing(true); }
②在获取数据完成后设置刷新状态为false
if (mSwipeRefreshLayout.isRefreshing()) { mSwipeRefreshLayout.setRefreshing(false); }
方法二:
①调用mSwipeRefreshLayout.measure()方法后,设置刷新状态为true
//手动调用,通知系统去测量 mSwipeRefreshLayout.measure(0,0); mSwipeRefreshLayout.setRefreshing(true);
②在获取数据完成后设置刷新状态为false
if (mSwipeRefreshLayout.isRefreshing()) { mSwipeRefreshLayout.setRefreshing(false); }
说明:
方法一和方法二的第一步的目的,都是为了在SwipeRefreshLayout绘制完成之后,再设置刷新状态为true,否则大多数情况下,SwipeRefreshLayout刷新球会不显示。
源码:
package org.raphets.swiperefreshlayoutdemo; import android.graphics.Color; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private SwipeRefreshLayout mSwipeRefreshLayout; private TextView mTextView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.srl); mTextView = (TextView) findViewById(R.id.tv); //设置刷新球颜色 mSwipeRefreshLayout.setColorSchemeColors(Color.BLUE, Color.RED, Color.YELLOW); mSwipeRefreshLayout.setProgressBackgroundColorSchemeColor(Color.parseColor("#BBFFFF")); //手动调用,通知系统去测量 // mSwipeRefreshLayout.measure(0,0); mSwipeRefreshLayout.setRefreshing(true); getData(); } /** * 模拟网络请求 */ private void getData() { new Thread() { @Override public void run() { super.run(); //模拟网络请求 try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } //在UI线程中更新UI runOnUiThread(new Runnable() { @Override public void run() { mTextView.setText("首次进入自动刷新"); if (mSwipeRefreshLayout.isRefreshing()) { mSwipeRefreshLayout.setRefreshing(false); } } }); } }.start(); } @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); mSwipeRefreshLayout.setRefreshing(true); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。