Android(安卓)Visible属性学习

在写Android的过程中发现有个属性，它有三种状态：VISIBLE、INVISIBLE、GONE，通过名字发现，三者似乎有一些区别，于是自己写了测试代码来验证。
首先是visiblity_test.xml文件

<?xml version="1.0" encoding="utf-8"?>"http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="fill_parent"              android:layout_height="fill_parent">    "match_parent"            android:layout_height="50dp"            android:orientation="horizontal"    >        "1"                android:layout_width="0dp"                android:layout_height="50dp"                android:text="TextView1"                android:background="#ffffff"                android:textColor="#000000"                android:gravity="center"        />        "@+id/TextView2"                android:layout_weight="1"                android:layout_width="0dp"                android:layout_height="50dp"                android:text="TextView2"                android:background="#fff000"                android:textColor="#000000"                android:gravity="center"        />

效果图如下

然后是MyActivity.java

package com.imudges.AndroidStudy;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class MyActivity extends Activity implements Button.OnClickListener {    /**     * Called when the activity is first created.     */    /**     * for visiblity test     * */    public TextView mTextView = null;    public Button btn_vis;    public Button btn_invis;    public Button btn_gone;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.visiblity_test);        initData();        btn_vis.setOnClickListener(this);        btn_invis.setOnClickListener(this);        btn_gone.setOnClickListener(this);    }    private void initData(){        btn_vis = (Button) findViewById(R.id.btn_vis);        btn_invis = (Button) findViewById(R.id.btn_invis);        btn_gone = (Button) findViewById(R.id.btn_gone);        mTextView = (TextView) findViewById(R.id.TextView2);    }    @Override    public void onClick(View view) {        switch (view.getId()){            case R.id.btn_vis: {                mTextView.setVisibility(View.VISIBLE);                break;            }            case R.id.btn_invis:{                mTextView.setVisibility(View.INVISIBLE);                break;            }            case R.id.btn_gone:{                mTextView.setVisibility(View.GONE);                break;            }        }    }}

有兴趣的同志可以试试~

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