final Handler myHandler = new Handler () { @Override public void handleMessage(Message msg) { if (msg.what == 0x1222) { } } };------------------------------------------------------------------------------------------------
new Timer().schedule( new TimerTask(){ //TimerTask类型的对象,TimerTask的run()方法是要周期执行的一个任务 @Override public void run() { currentColor ++; if (currentColor >= 6) currentColor = 0; Message m = new Message(); m. what = 0x1122; handler.sendMessage(m); } }, 0 , //表示多长时间后开始执行 100//执行的周期 );
public class FrameLayoutTest extends Activity { private int currentColor = 0; final int[] colors = new int[] { R.color.color7, R.color.color6, R.color.color5, R.color.color4, R.color.color3, R.color.color2, R.color.color1, }; final int[] names = new int[] { R.id.View01, R.id.View02, R.id.View03, R.id.View04, R.id.View05, R.id.View06, R.id.View07 }; TextView[] views = new TextView[7]; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); for (int i = 0 ; i < 7 ; i++) { views[i] = (TextView)findViewById(names[i]); } final Handler handler = new Handler() { @Override public void handleMessage(Message msg) { if(msg.what == 0x1122) { for(int i = 0 ; i < 7 - currentColor ; i++) { views[i].setBackgroundResource(colors[i + currentColor]); } for(int i = 7 - currentColor , j = 0 ; i < 7 ; i++ ,j++) { views[i].setBackgroundResource(colors[j]); } } } }; new Timer().schedule(new TimerTask() { @Override public void run() { currentColor++; if(currentColor >= 6) { currentColor = 0; } Message m = new Message(); m.what = 0x1122; handler.sendMessage(m); } }, 0 , 100); } }
public class HandlerTest extends Activity { int[] imageIds = new int[] { R.drawable.haed_danya, R.drawable.haed_fanse, R.drawable.haed_fugu, R.drawable.haed_gudian, R.drawable.haed_houqingchu }; int currentImageId = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ImageView show = (ImageView)findViewById(R.id.show); final Handler myHandler = new Handler() { @Override public void handleMessage(Message msg) { if (msg.what == 0x1222) { show.setImageResource(imageIds[currentImageId++]); if (currentImageId >= 4) { currentImageId = 0; } } } }; new Timer().schedule(new TimerTask() { @Override public void run() { Message msg = new Message(); msg.what = 0x1222; myHandler.sendMessage(msg); } }, 0 , 100); } }
Android的Handle学习,布布扣,bubuko.com
原文:http://blog.csdn.net/imlanbin/article/details/19985271