自定义View仿TabHost的实现(一)

最新推荐文章于 2021-05-26 17:54:57 发布

谷哥的小弟

最新推荐文章于 2021-05-26 17:54:57 发布

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本文链接：https://blog.youkuaiyun.com/lfdfhl/article/details/8442800

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本文介绍了一种自定义的底部菜单视图组件，该组件模仿了TabHost的功能，并通过切换不同的LinearLayout来实现Activity间的跳转。文章详细展示了如何创建四个不同的Activity以及如何通过底部菜单在这些Activity之间进行导航。

Activity1如下:

package cn.com;
import android.app.Activity;
import android.os.Bundle;
public class Activity1 extends Activity{
     @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	//设置setTitle应该在setTitle之前
    	//否则不起作用
    	setTitle("Activity1");
    	setContentView(R.layout.activity_1);
    }
}

Activity2如下:

package cn.com;
import android.app.Activity;
import android.os.Bundle;
public class Activity2 extends Activity{
     @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	//设置setTitle应该在setTitle之前
    	//否则不起作用
    	setTitle("Activity2");
    	setContentView(R.layout.activity_2);
    }
}

Activity3如下:

package cn.com;
import android.app.Activity;
import android.os.Bundle;
public class Activity3 extends Activity{
     @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	//设置setTitle应该在setTitle之前
    	//否则不起作用
    	setTitle("Activity3");
    	setContentView(R.layout.activity_3);
    }
}

Activity4如下:

package cn.com;
import android.app.Activity;
import android.os.Bundle;
public class Activity4 extends Activity{
     @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	//设置setTitle应该在setTitle之前
    	//否则不起作用
    	setTitle("Activity4");
    	setContentView(R.layout.activity_4);
    }
}

BottomMenuView如下:

package cn.com;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
//自定义View.仿TabHost的实现
public class BottomMenuView extends LinearLayout{
	private Context mContext;
	private LinearLayout mLinearLayout1;
	private LinearLayout mLinearLayout2;
	private LinearLayout mLinearLayout3;
	private LinearLayout mLinearLayout4;
	private String mCurrentActivityTitle;
	private final static String ACTIVITY_NAME_1="Activity1";
	private final static String ACTIVITY_NAME_2="Activity2";
	private final static String ACTIVITY_NAME_3="Activity3";
	private final static String ACTIVITY_NAME_4="Activity4";
	public BottomMenuView(Context context, AttributeSet attrs) {
		super(context, attrs);
		mContext=context;
		initView();
	}
	private void initView(){
		View bottomMenuView=
		LayoutInflater.from(mContext).inflate(R.layout.bottommenu, null, false);
		ViewGroup.LayoutParams params=
		new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
		this.addView(bottomMenuView,params);
		
		mLinearLayout1=(LinearLayout)
		bottomMenuView.findViewById(R.id.menu_LinearLayout1);
		mLinearLayout2=(LinearLayout)
		bottomMenuView.findViewById(R.id.menu_LinearLayout2);
		mLinearLayout3=(LinearLayout)
		bottomMenuView.findViewById(R.id.menu_LinearLayout3);
		mLinearLayout4=(LinearLayout)
		bottomMenuView.findViewById(R.id.menu_LinearLayout4);
		
		BottomMenuOnClickListener clickListener=new BottomMenuOnClickListener();
		mLinearLayout1.setOnClickListener(clickListener);
		mLinearLayout2.setOnClickListener(clickListener);
		mLinearLayout3.setOnClickListener(clickListener);
		mLinearLayout4.setOnClickListener(clickListener);
		setEveryMenuStatus();
	}
	
	/**
	 * 
	 * 1 在每个menu对应的Activity中设置其Title
	 * 2 在此判断当前显示是哪一个Activity.使得
	 *   当前Activity对应的Menu不可再次点击.
	 */
	private void setEveryMenuStatus(){
		mCurrentActivityTitle=(String) ((Activity)mContext).getTitle();
		if (mCurrentActivityTitle.equals(ACTIVITY_NAME_1)) {
			mLinearLayout1.setClickable(false);
		}else if (mCurrentActivityTitle.equals(ACTIVITY_NAME_2)) {
			mLinearLayout2.setClickable(false);
		}else if (mCurrentActivityTitle.equals(ACTIVITY_NAME_3)) {
			mLinearLayout3.setClickable(false);
		}else if (mCurrentActivityTitle.equals(ACTIVITY_NAME_4)) {
			mLinearLayout4.setClickable(false);
		}
	}
	
	private class BottomMenuOnClickListener implements OnClickListener{
		public void onClick(View v) {
			switch (v.getId()) {
			case R.id.menu_LinearLayout1:
				Intent intent1=new Intent(mContext, Activity1.class);
				mContext.startActivity(intent1);
				break;
			case R.id.menu_LinearLayout2:
				Intent intent2=new Intent(mContext, Activity2.class);
				mContext.startActivity(intent2);
				break;
			case R.id.menu_LinearLayout3:
				Intent intent3=new Intent(mContext, Activity3.class);
				mContext.startActivity(intent3);
				break;
			case R.id.menu_LinearLayout4:
				Intent intent4=new Intent(mContext, Activity4.class);
				mContext.startActivity(intent4);
				break;
			default:
				break;
			}
			
		}
		
	}

}