package com.example.myapplication; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import java.util.Timer; import java.util.TimerTask; public class MainActivity extends AppCompatActivity { public int[] color=new int[]{ R.color.color1, R.color.color2, R.color.color3, R.color.color4, R.color.color5, R.color.color6, }; final int[] names=new int[]{ R.id.text01, R.id.text02, R.id.text03, R.id.text04, R.id.text05, R.id.text06, }; TextView[] views=new TextView[names.length]; Handler handler=new Handler() { @Override public void handleMessage(Message msg) { if (msg.what==0x123) { for (int i=0;i<names.length;i++) { views[i].setBackgroundResource(color[(i+currentColor)%names.length]); } currentColor++; } super.handleMessage(msg); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); for (int i=0;i<names.length;i++) { views[i] = (TextView) findViewById(names[i]); } new Timer().schedule(new TimerTask() { @Override public void run() { handler.sendEmptyMessage(0x123); } },0,200); } }
变量都不声明定义,能用才是怪了
还有currentColor++有什么意义,send 、handleMessage都只执行一次
color[(i+currentColor)%names.length]这里面的currentColor都没必要用
要用的话currentColor++也是放在for循环里面