在Activity画面中间添加闪烁的文字，

项目中需要添加在pc版上面的差不多的效果。比如在员工练习模式下，画面正中间不断闪烁几个汉字：“练习模式”.

或许这种方法不是很好，但我确实是这样做的。假定activity画面比较复杂的情况下。

代码其实很简单，直接贴上来了。

package com.example.sqlitepagetest;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;

/**
 * 

 * 
 * 下午11:52:59
 * 
 * @auther dalvikCoder
 */
public class Activity2 extends Activity {

	Button btn;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity2);

		btn = (Button) findViewById(R.id.btntrain);
		addAliveText();
	}

	private TextView aliveText;

	/** 文字闪烁线程 **/
	private TextThread textThread = null;

	private void addAliveText() {

		aliveText = new TextView(this);
		aliveText.setText("练习模式");
		aliveText.setTextColor(Color.RED);
		aliveText.setTextSize(50);
		aliveText.setBackgroundColor(Color.TRANSPARENT);
		aliveText.setGravity(Gravity.CENTER | Gravity.CENTER_VERTICAL);
		FrameLayout.LayoutParams p = new FrameLayout.LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT,
				Gravity.CENTER | Gravity.CENTER_VERTICAL);
		this.addContentView(aliveText, p);

		if (textThread == null) {
			textThread = new TextThread();
			textThread.start();
		}
	}

	/**
	 * @author  练习模式文字闪烁
	 */
	public class TextThread extends Thread {
		@Override
		public void run() {
			do {
				try {
					Thread.sleep(1 * 1000);// 每隔1s闪现一次
					Message msg = new Message();
					msg.what = 6;
					timeHandler.sendMessage(msg);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			} while (true);
		}
	}

	private Handler timeHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			switch (msg.what) {

			case 6:
				if (aliveText.getVisibility() == View.VISIBLE) {

					aliveText.setVisibility(View.INVISIBLE);
				} else if (aliveText.getVisibility() == View.INVISIBLE) {

					aliveText.setVisibility(View.VISIBLE);
				}

				break;
			}
		}
	};
}

当我们的activity比较复杂，而且用户点击画面响应事件时，这个闪动的文字，并不会影响事件处理。除非特地给他加了事件监听。

大家可以比较一下这两个方法的区别：

this.addContentView(aliveText, p);

setContentView(R.layout.activity2);