android---简单的拨号器

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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:src="@drawable/ic_launcher" />
    <LinearLayout 
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_height="wrap_content"
        android:layout_weight="1">

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />

    </LinearLayout>

</LinearLayout>

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