Android 用代理模式处理海量高频数据更新

核心提示：@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);final TextView tv = (TextView)findVie

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

final TextView tv = (TextView)findViewById(R.id.txtview);

new Thread() {

java.util.Random rand = new java.util.Random();

long lastUpdate = System.currentTimeMillis();

public void run() {

while(!Thread.interrupted() || !TestActivity.this.isFinishing()) {

//模拟高频更新数据

if( System.currentTimeMillis() - lastUpdate < 2000l) { //设置两次动画的最少间隔时间

continue;

}

else

lastUpdate = System.currentTimeMillis();

CommonDefn.DoThingsReturn updateWrapper = new CommonDefn.DoThingsReturn(String.valueOf(rand.nextInt()) , tv,0);

ColorRefreshTask refresh = new ColorRefreshTask(TestActivity.this,CommonDefn.HIGHLIGHT_BACKGROUND_COLOR_INDEX, updateWrapper);

_messageHandler.postDelayed(refresh, 200); //ready to for the current updating

}

}

}.start();

}

}

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.view.View;

import android.widget.TextView;

public class TestActivity extends Activity implements RefreshHandlerInterface{

private Handler _messageHandler = new Handler();

@Override

public Handler getHandler() {

return _messageHandler;

}

@Override

public void updateBackground(Object handlerId, int color) {

if(!( handlerId instanceof CommonDefn.DoThingsReturn)) {

return; //invalid parameter

}

else {

TextView current = (TextView)(((CommonDefn.DoThingsReturn)handlerId).data);

if(current.getVisibility() != View.VISIBLE) {

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