【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

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;    }}

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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;    }}

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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;        }            }    }

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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));        }            }}