Android - ContactPicker(選擇聯系人) 詳解

ContactPicker(選擇聯系人) 詳解

 

 

ContactPicker:用戶可以選擇一個聯系人.

 

1. 創建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. 創建一個活動繼承Activity, 顯示activity_main界面;

2. 創建游標Cursor遍歷存儲在聯系人列表中的聯系人;

3. 構造簡單游標適配器(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), 將游標移植點擊位置, 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. 創建listitemlayout.xml

位置: res->layout->listitemlayout.xml

 

TextView顯示ListView中的每一個聯系人, ContactPicker會調用此布局(layout);

 

 

4. 創建測試布局contactpickertester.xml

位置: res->layout->contactpickertester.xml

 

TextView顯示選擇的聯系人,Button選擇按鈕, 啟動界面;

 

 

5. 創建測試類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, 和聯系人數據庫(content://contacts/);

3. 重寫onActivityResult()事件, 處理動作返回值, reqCode, 請求碼, resCode, 結果碼, data, Intent數據;

4. 提取數據, 更新ViewText的內容;

 

6. 修改Manifest, 進行注冊

位置: root->AndroidManifest.xml

 

1. 注冊ContactPicker, intent-filter, 動作PICK, 種類DEFAULT(默認動作);

 

2. 注冊ContactPickerTester, 啟動(MAIN)程序;

 

7. 運行程序

 

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