Android实现带动画效果的Tab Menu，androidtab

Android实现带动画效果的Tab Menu，androidtab

今天给大家介绍如何在Android下实现一个带动画效果的Tab Menu。Tab Menu的打开动画效果为自下而上的淡入推进效果，关闭效果为自上而下的淡出推出效果。

实现的效果图如下(没有找到合适的屏幕录像工具，只能截静态图)：

1.[图片] 程序运行效果

2.[文件] dockmenu.rar~49KB 下载(1040)

3.TabMenuActivity.java

package com.zhuozhuo;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.TextView;

public class TabMenuActivity extends Activity {
	/** Called when the activity is first created. */
	
	TabView dockView;
	TextView tv;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		tv = (TextView) findViewById(R.id.tv);
		dockView = new DockView(this);
	}

	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_MENU) {//监听menu键
			if(dockView.isOpen()) {
				tv.setText("点击menu键打开dock");
				
				dockView.closeDock();//关闭dock
			}
			else {
				tv.setText("再次点击menu键或者back键关闭dock");
				dockView.openDock();//打开dock
			}
			return true;
		}
		if (keyCode == KeyEvent.KEYCODE_BACK) {//监听back键
			if(dockView.isOpen()) {//当dock打开时，按back键关闭dock
				dockView.closeDock();
				return true;
			}
		}
		return super.onKeyDown(keyCode, event);
	}
	

}

4.TabView.java

package com.zhuozhuo;

import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.Toast;

public class TabView {

	private static final int INTERVAL_TIME = 50;// 每个tab之间的动画时间间隔ms

	private View tab1;
	private View tab2;
	private View tab3;
	private View tab4;
	
	private Activity context;
	
	private boolean isOpen;

	public TabView(Activity context) {
		this.context = context;
		tab1 = context.findViewById(R.id.tab1);
		tab2 = context.findViewById(R.id.tab2);
		tab3 = context.findViewById(R.id.tab3);
		tab4 = context.findViewById(R.id.tab4);
		setOnClickListener(tab1, 1);
		setOnClickListener(tab2, 2);
		setOnClickListener(tab3, 3);
		setOnClickListener(tab4, 4);
	}

	public void openDock() {//打开dock
		tab(tab1, 0, true);
		tab(tab2, INTERVAL_TIME * 1, true);
		tab(tab3, INTERVAL_TIME * 2, true);
		tab(tab4, INTERVAL_TIME * 3, true);
		isOpen = true;
	}
	
	private void setOnClickListener(View view, final int pos) {
		view.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Toast.makeText(context, "view" + pos + " click!", Toast.LENGTH_SHORT).show();//点击tab时显示toast
				closeDock();
			}
		});
	}
	
	private void tab(final View view,int delayTime,final boolean toOpen) {
		view.postDelayed(new Runnable() {

			@Override
			public void run() {
				Animation animation;
				
				if(toOpen) {
					view.setVisibility(View.VISIBLE);//动画开始前,设置view可见
					animation = AnimationUtils.loadAnimation(context, R.anim.show_tab);
					view.startAnimation(animation);
					
				}
				else {
					animation = AnimationUtils.loadAnimation(context, R.anim.close_tab);
					animation.setAnimationListener(new AnimationListener() {
						
						@Override
						public void onAnimationStart(Animation animation) {
							
						}
						
						@Override
						public void onAnimationRepeat(Animation animation) {
							
						}
						
						@Override
						public void onAnimationEnd(Animation animation) {
							view.setVisibility(View.INVISIBLE);//动画结束时,view不可见
							
						}
					});
					view.startAnimation(animation);
					
					
				}
				
			}
		}, delayTime);
	}
	
	public boolean isOpen() {
		return isOpen;
	}

	public void closeDock() {//关闭dock
		tab(tab1, 0, false);
		tab(tab2, INTERVAL_TIME * 1, false);
		tab(tab3, INTERVAL_TIME * 2, false);
		tab(tab4, INTERVAL_TIME * 3, false);
		isOpen = false;
	}
}