8.19更新,这里的adapter中的getview优化并不是很好,最好的方法是用静态内部类,后面文章有利用前面的listview和intent做出来的简单的拨号器,主要是可以直接拨打常用的急救电话mainactivity:

package com.niuli.demo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;public class MainActivity extends Activity {
         private Button specialcall;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        specialcall = (Button) findViewById(R.id.button1);        specialcall.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View arg0) {                Intent intent = new Intent(MainActivity.this,Listviewdemo.class);                startActivity(intent);            }        });    }}

listviewadapter:

package com.niuli.demo;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;public class Listviewadapter extends BaseAdapter {
         private Context context = null;    public Listviewadapter(Context context) {        this.context = context;    }    public Context getContext() {        return context;    }    Listviewdata Data[] = new Listviewdata[]{        new Listviewdata("警匪", "110"),        new Listviewdata("急救", "120"),        new Listviewdata("火警", "119"),        new Listviewdata("交通事故", "122"),        new Listviewdata("天气预报", "12121"),        new Listviewdata("森林火警", "95119"),        new Listviewdata("水上求救", "12395")    };    @Override    public int getCount() {        return Data.length;    }    @Override    public Object getItem(int arg0) {        return Data[arg0];    }    @Override    public long getItemId(int arg0) {        return arg0;    }    /**     * 使用自定义的xml来显示,需要LinearLayout的解析器来解析读取     * 重点内容,这里的优化并不是很好,最好的方法是用静态内部类,后面文章有     */    @Override    public View getView(int arg0, View arg1, ViewGroup arg2) {        LinearLayout ll = null;        if (arg1!=null) {            ll = (LinearLayout) arg1;        }else {            //这里需要得到context的实例来完成解析            ll = (LinearLayout) LayoutInflater.from(getContext()).inflate(R.layout.listviewdemo, null);        }        Listviewdata data = Data[arg0];             ImageView icon = (ImageView) ll.findViewById(R.id.imageView1);        TextView textView1 = (TextView) ll.findViewById(R.id.textView1);        TextView textView2 = (TextView) ll.findViewById(R.id.textView2);        icon.setImageResource(data.getIconm());        textView1.setText(data.getDec());        textView2.setText(data.getNumber());        return ll;    }}

listviewdata:

package com.niuli.demo;public class Listviewdata {    public Listviewdata(String dec,String number) {        this.number = number;        this.dec = dec;    }    private String number;    private String dec;    public String getNumber() {        return number;    }    public void setNumber(String number) {        this.number = number;    }    public String getDec() {        return dec;    }    public void setDec(String dec) {        this.dec = dec;    }    public int getIconm() {        return iconm;    }    public void setIconm(int iconm) {        this.iconm = iconm;    }    private int iconm = R.drawable.img1;}

listviewdemo:

package com.niuli.demo;import android.app.ListActivity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import android.widget.Toast;public class Listviewdemo extends ListActivity{
         private Intent intent;    String uri = "tel:";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setListAdapter(new Listviewadapter(this));        intent = new Intent(Intent.ACTION_VIEW);    }    @Override    protected void onListItemClick(ListView l, View v, int position, long id) {        switch (position) {        case 0:            intent.setData(Uri.parse(uri+"110"));            startActivity(intent);            break;        case 1:            intent.setData(Uri.parse(uri+"120"));            startActivity(intent);            break;        case 2:            intent.setData(Uri.parse(uri+"119"));            startActivity(intent);            break;        case 3:            intent.setData(Uri.parse(uri+"122"));            startActivity(intent);            break;        case 4:            intent.setData(Uri.parse(uri+"12121"));            startActivity(intent);            break;        case 5:            intent.setData(Uri.parse(uri+"95119"));            startActivity(intent);            break;        case 6:            intent.setData(Uri.parse(uri+"12395"));            startActivity(intent);            break;        default:            break;        }        super.onListItemClick(l, v, position, id);    }}

listviewdemo.xml

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