小程序 加载时闪烁点样式的启动画面.rar

package com.testindex; import android.app.Activity; import android.content.res.Resources; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.SystemClock; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ImageView; public class MainActivity extends Activity { /** Called when the activity is first created. */ private int count = 5; private int[] imgIDs = {R.id.widget29,R.id.widget30,R.id.widget31,R.id.widget32,R.id.widget33}; private int INDEX_SELECTED = 0; private final int EDIT_TYPE_SELECTED = 1; //选中的 private final int EDIT_TYPE_NO_SELECTED = 2; //未选中的 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final IndexThread thread = new IndexThread(); for(int id : imgIDs) ((ImageView)findViewById(id)).setBackgroundResource(R.drawable.progress_bg_small); thread.start(); Button btn = (Button)findViewById(R.id.button1); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { thread.flag = false; } }); } public Handler myHandler = new Handler() { @Override public void handleMessage(Message msg) { Log.i("Test","---"+ msg.arg1); switch(msg.what) { case EDIT_TYPE_SELECTED: ((ImageView)findViewById(msg.arg1)).setBackgroundResource(R.drawable.progress_go_small); break; case EDIT_TYPE_NO_SELECTED: ((ImageView)findViewById(msg.arg1)).setBackgroundResource(R.drawable.progress_bg_small); break; } } }; class IndexThread extends Thread { boolean flag = true; @Override public void run() { Message msg; while(flag) { for(int i= 0 ; i < count ; i++) { Log.i("Test","---"+ count); msg = new Message(); msg.what = EDIT_TYPE_SELECTED; msg.arg1 = imgIDs[i]; myHandler.sendMessage(msg); //findViewById(imgIDs[i]).setBackgroundResource(R.drawable.progress_go_small); msg = new Message(); if(i==0) { msg.what = EDIT_TYPE_NO_SELECTED; msg.arg1 = imgIDs[count-1]; myHandler.sendMessage(msg); //findViewById(imgIDs[count-1]).setBackgroundResource(R.drawable.progress_bg_small); } else { msg.what = EDIT_TYPE_NO_SELECTED; msg.arg1 = imgIDs[i-1]; myHandler.sendMessage(msg); //findViewById(imgIDs[i-1]).setBackgroundResource(R.drawable.progress_bg_small); } SystemClock.sleep(500); } } } } }