android小笔记

       android实现测试网络是否连通代码：调用系统ConnectivityManager cm = (ConnectivityManager)

     this.getSystemService(CONNECTIVITY_SERVICE);，通过这个方法进行测试

ConnectivityManager cm = (ConnectivityManager)
this.getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if(null!=netInfo && netInfo.isAvailable()){
Toast.makeText(this, "网络处于连通状态", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(this, "网络不通，请检查网络状况", Toast.LENGTH_SHORT).show();
}

 
 
android显示html文本：

//普通文本
TextView tv1 = (TextView)this.findViewById(R.id.textView1);
tv1.setTextColor(Color.BLUE);
tv1.setBackgroundColor(Color.RED);
tv1.setTextSize(30);

//html文本
String html = "

div文本" ;
html += "我的主页:http://www.zuji365.net
";
html += "我的Email:113605829@qq.com
";
html += "我的电话:13450233156
";
CharSequence text = Html.fromHtml(html);
TextView tv2 = (TextView)this.findViewById(R.id.textView2);
tv2.setText(text);//显示html文本
tv2.setMovementMethod(LinkMovementMethod.getInstance());//表示激活超链接

 
 
添加QQ表情，图片实例

package com.tocean.android02;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

/**
* 讲解EditText
*
* @author Administrator
*
*/
public class Test05Activity extends Activity implements OnClickListener {

@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
// 使用一个全新的布局文件
this.setContentView(R.layout.test05_activity);
et3 = (EditText) this.findViewById(R.id.et3);

Button bq1 = (Button) this.findViewById(R.id.bq1);
bq1.setOnClickListener(this);
}

private EditText et3;

@Override
public void onClick(View v) {

// 构造一个可扩展的文本,可以添加表情
SpannableString ss = new SpannableString("[face]");
Drawable dr = v.getBackground();// 获得按钮的背景图片
dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
// 构造图片文本
ImageSpan is = new ImageSpan(dr, ImageSpan.ALIGN_BASELINE);
//把上面的[face]占位符替换成图片文本
ss.setSpan(is, 0, 6, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
int currentPostion = et3.getSelectionStart();//得到光标所处的位置
et3.getText().insert(currentPostion, ss);
}
}

 



输入提醒功能

package com.tocean.android02;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.MultiAutoCompleteTextView;

/**
* 讲解EditText
*
* @author Administrator
*
*/
public class Test06Activity extends Activity {

private static String[] countries = { "China", "Japan", "England",
"Google", "Huawei", "Xiaomi", "Good" };

@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
// 使用一个全新的布局文件
this.setContentView(R.layout.test06_activity);

//创建适配器(用到系统自动的一些图片和布局)
ArrayAdapter adapter
= new ArrayAdapter(this,
android.R.layout.simple_dropdown_item_1line,
countries);

AutoCompleteTextView  actv
= (AutoCompleteTextView)this.findViewById(R.id.actv);
MultiAutoCompleteTextView mactv
= (MultiAutoCompleteTextView)this.findViewById(R.id.mactv);

//设置适配器
actv.setAdapter(adapter);
mactv.setAdapter(adapter);
mactv.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

}

}