这次主要实现设置安全号码的功能，即当发现手机SIM卡信息发生改变时，会自动给安全号码发送一条报警短信。主要包括选择联系人功能。涉及到的知识点包括：带返回值的Intent，ListView数据适配器。

选择联系人功能

• 界面

用ListView来对读取的联系人进行展示

/mobilesafe/res/layout/select_contact.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:background="@color/background"
    android:orientation="vertical" >
    
    <ListView 
        android:id="@+id/lv_select_contact"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        
        ></ListView>

</LinearLayout>

获取手机联系人数据

联系人数据封装实体

• /mobilesafe/src/com/liuhao/mobilesafe/domain/ContactInfo.java

package com.liuhao.mobilesafe.domain;

/**
 * 联系人数据
 * 
 * @author liuhao
 * 
 */
public class ContactInfo {

    private String name;
    private String phone;

    public ContactInfo() {

    }

    public ContactInfo(String name, String phone) {
        this.name = name;
        this.phone = phone;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

}

获取联系人数据业务类

• /mobilesafe/src/com/liuhao/mobilesafe/engine/ContactInfoService.java

package com.liuhao.mobilesafe.engine;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;

import com.liuhao.mobilesafe.domain.ContactInfo;

public class ContactInfoService {

    private Context context;

    public ContactInfoService(Context context) {
        this.context = context;
    }

    public List<ContactInfo> getContactInfos() {

        ContentResolver resolver = context.getContentResolver();

        // 1.获取联系人的id
        // 2.根据联系人的id获取联系人姓名
        // 3.根据联系人id 数据的type，获取对应的数据（电话，email等）
        
        List<ContactInfo> infos = new ArrayList<ContactInfo>();
        ContactInfo info;
        
        Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
        Uri dataUri = Uri.parse("content://com.android.contacts/data");
        
        Cursor cursor = resolver.query(uri, null, null, null, null);
        while (cursor.moveToNext()) {
            info = new ContactInfo();
            
            String id = cursor.getString(cursor.getColumnIndex("_id"));
            String name = cursor.getString(cursor.getColumnIndex("display_name"));
            if(name==null) continue;
//          System.out.println(name);
            info.setName(name);
            
            Cursor dataCursor = resolver.query(dataUri, null, "raw_contact_id=?", new String[]{id}, null);
            while(dataCursor.moveToNext()){
                String type = dataCursor.getString(dataCursor.getColumnIndex("mimetype"));
                String phone = dataCursor. getString(dataCursor.getColumnIndex("data1"));
                if(phone==null || type==null) continue;
                
                // 若是电话号码才添加
                if("vnd.android.cursor.item/phone_v2".equals(type)){
                    info.setPhone(phone);
                }
                
//              System.out.println(phone);
//              System.out.println(type);
//              System.out.println("-------");
            }
            infos.add(info);
            info = null;
            dataCursor.close();
//          System.out.println("####################3");
        }
        cursor.close();
        return infos;
    }

}

数据适配

package com.liuhao.mobilesafe.ui;

import java.util.List;

import com.liuhao.mobilesafe.R;
import com.liuhao.mobilesafe.domain.ContactInfo;
import com.liuhao.mobilesafe.engine.ContactInfoService;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class SelectContactActivity extends Activity {
    
    private ListView lv;
    private List<ContactInfo> infos;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.select_contact);
        
        ContactInfoService service = new ContactInfoService(this);
        infos = service.getContactInfos();// 获取到联系人数据
        
        lv = (ListView) this.findViewById(R.id.lv_select_contact);
        lv.setAdapter(new SelectContactAdapter());// 将联系人数据适配到ListView中
        lv.setOnItemClickListener(new OnItemClickListener() {// 设置点击每个条目时的响应事件

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                String phone = infos.get(position).getPhone();// 获取到该联系人的号码
                Intent intent = new Intent();
                intent.putExtra("phone", phone);// 将号码数据设置到Intent中
                setResult(0, intent);// Call this to set the result that your activity will return to its caller. 将Intent结果返回给调用者
                finish();
            }
            
        });
        
    }
    
    private class SelectContactAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            return infos.size();
        }

        @Override
        public Object getItem(int position) {
            return infos.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ContactInfo info = infos.get(position);
            LinearLayout ll = new LinearLayout(SelectContactActivity.this);
            ll.setOrientation(LinearLayout.VERTICAL);
            TextView tv_name = new TextView(SelectContactActivity.this);
            tv_name.setText("联系人：" + info.getName());
            tv_name.setTextColor(getResources().getColor(R.color.textcolor));
            TextView tv_phone = new TextView(SelectContactActivity.this);
            tv_phone.setText("电话：" + info.getPhone());
            tv_phone.setTextColor(getResources().getColor(R.color.textcolor));
            ll.addView(tv_name);
            ll.addView(tv_phone);
            return ll;
        }
        
    }
    
}

Activity直接传递数据

package com.liuhao.mobilesafe.ui;

import com.liuhao.mobilesafe.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class SetupWizard3Activity extends Activity implements OnClickListener {

    private Button bt_select_contact;
    private Button bt_next;
    private Button bt_prev;
    private EditText et_number;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.setup_wizard3);
        
        bt_select_contact = (Button) this.findViewById(R.id.bt_select_contact);
        bt_next = (Button) this.findViewById(R.id.bt_next);
        bt_prev = (Button) this.findViewById(R.id.bt_previous);
        et_number = (EditText) this.findViewById(R.id.et_setup3_phonenumber);
        
        bt_select_contact.setOnClickListener(this);
        bt_next.setOnClickListener(this);
        bt_prev.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch(v.getId()){
        case R.id.bt_select_contact:
            Intent intent = new Intent(this, SelectContactActivity.class);
            // 激活一个带返回值的界面
            startActivityForResult(intent, 0);
            break;
        case R.id.bt_next:
            finish();// 用户点击“后退”时不会再看到这个界面
            Intent intent4 = new Intent(this, SetupWizard4Activity.class);
            startActivity(intent4);
            // 设置Activity切换时的动画效果
            overridePendingTransition(R.anim.alpha_in, R.anim.alpha_out);
            break;
        case R.id.bt_previous:
            finish();// 用户点击“后退”时不会再看到这个界面
            Intent intent2 = new Intent(this, SetupWizard2Activity.class);
            startActivity(intent2);
            // 设置Activity切换时的动画效果
            overridePendingTransition(R.anim.alpha_in, R.anim.alpha_out);
            break;
            
        }
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        
        if(data != null){
            String phone = data.getStringExtra("phone");
            et_number.setText(phone);
            et_number.setTextColor(getResources().getColor(R.color.textcolor));
        }
        
    }

}

【边做项目边学Android】手机安全卫士11-设置向导之设置安全号码