Android - ContactPicker(選擇連絡人) 詳解

ContactPicker(選擇連絡人) 詳解

 

 

ContactPicker:使用者可以選擇一個連絡人.

 

1. 建立ContactPicker活動(Activity)

位置: java->package-> ContactPicker.java

 

package mzx.spike.contactpicker.app;import android.app.Activity;import android.content.ContentUris;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.SimpleCursorAdapter;/** * Created by C.L.Wang on 14-3-20. */public class ContactPicker extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final Cursor c = getContentResolver().query(                ContactsContract.Contacts.CONTENT_URI, null, null, null, null        );        String[] from = new String[]{ContactsContract.Contacts.DISPLAY_NAME_PRIMARY};        int[] to = new int[]{R.id.itemTextView};        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.listitemlayout, c, from, to, 0);        ListView lv = (ListView)findViewById(R.id.contactListView);        lv.setAdapter(adapter);        lv.setOnItemClickListener(new ListView.OnItemClickListener(){            public void onItemClick(AdapterView parent, View view, int pos, long id) {                c.moveToPosition(pos);                int rowId = c.getInt(c.getColumnIndexOrThrow(_id));                Uri outURI = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, rowId);                Intent outData = new Intent();                outData.setData(outURI);                setResult(Activity.RESULT_OK, outData);                finish();            }        });    }}

詳解:

 

1. 建立一個活動繼承Activity, 顯示activity_main介面;

2. 建立遊標Cursor遍曆儲存在連絡人清單中的連絡人;

3. 構造簡單遊標適配器(SimpleCursorAdapter), 注意此方法標記為遺棄, 後面需要加上參數0, 版本SDK11+;

4. 將適配器綁定至ListView, setAdapter();

5. 添加項目點擊事件(setOnItemClickListener), 將遊標移植點擊位置, 取出rowID, 構造URI, 將URI綁定至Intent,;

6. 返回結果, setResult(), 結果碼(Activity_RESULT_OK) 和 Intent;

 

2. 修改activity_main.xml

位置: res->layout->activity_main.xml

 

添加 ListView, ContactPicker會調用此布局(layout);

 

 

3. 建立listitemlayout.xml

位置: res->layout->listitemlayout.xml

 

TextView顯示ListView中的每一個連絡人, ContactPicker會調用此布局(layout);

 

 

4. 建立測試布局contactpickertester.xml

位置: res->layout->contactpickertester.xml

 

TextView顯示選擇的連絡人, Button選擇按鈕, 啟動介面;

 

 

5. 建立測試類別ContactPickerTester.java

位置: java->package->ContactPickerTester.java

 

package mzx.spike.contactpicker.app;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.TextView;/** * Created by Administrator on 14-3-20. */public class ContactPickerTester extends Activity {    public static final int PICK_CONTACT = 1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.contactpickertester);        Button button = (Button)findViewById(R.id.pick_contact_button);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Intent intent = new Intent(Intent.ACTION_PICK, Uri.parse(content://contacts/));                startActivityForResult(intent, PICK_CONTACT);            }        });    }    @Override    public void onActivityResult(int reqCode, int resCode, Intent data) {        super.onActivityResult(reqCode, resCode, data);        switch (reqCode) {            case (PICK_CONTACT) : {                if (resCode == Activity.RESULT_OK) {                    Uri contactData = data.getData();                    Cursor c = getContentResolver().query(contactData,null, null, null, null);                    c.moveToFirst();                    String name = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME_PRIMARY));                    c.close();                    TextView tv = (TextView)findViewById(R.id.selected_contact_textview);                    tv.setText(name);                }            }            default: break;        }    }}

1. 在onCreate()方法內, 重寫 按鍵監聽事件(button.setOnClickListene());

 

2. 在onClick()方法中, 指定Intent.ACTION_PICK動作, 和連絡人資料庫(content://contacts/);

3. 重寫onActivityResult()事件, 處理動作傳回值, reqCode, 請求碼, resCode, 結果碼, data, Intent資料;

4. 提取資料, 更新ViewText的內容;

 

6. 修改Manifest, 進行註冊

位置: root->AndroidManifest.xml

 

1. 註冊ContactPicker, intent-filter, 動作PICK, 種類DEFAULT(預設動作);

 

2. 註冊ContactPickerTester, 啟動(MAIN)程式;

 

7. 運行程式

 

代碼下載: http://download.csdn.net/detail/u012515223/7072781