16读取通话记录

• 所需权限

  <!-- 获取拨打电话的记录权限 -->
      <uses-permission android:name="android.permission.READ_CALL_LOG"/>

• layout 布局文件
  mainActivity

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      tools:context=".MainActivity" >
  
      <ListView
          android:id="@+id/lv"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
        />
  
      <TextView 
          android:id="@+id/tv"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="暂无数据"
          android:layout_centerInParent="true"
          android:textColor="#f00"
          android:textSize="30sp"
          />
  
  </RelativeLayout>
  

list填充文件

<?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="vertical" >

    <TextView 
        android:id="@+id/tv_number"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />
    <TextView 
        android:id="@+id/tv_date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />


</LinearLayout>

• 逻辑代码 mainActivity.java

  package com.qf.day16_contentresolver_call_demo2;
  
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.logging.SimpleFormatter;
  
  import android.net.Uri;
  import android.os.Bundle;
  import android.provider.CallLog;
  import android.app.Activity;
  import android.content.ContentResolver;
  import android.database.Cursor;
  import android.view.Menu;
  import android.widget.ListView;
  import android.widget.SimpleAdapter;
  import android.widget.TextView;
  
  /**
   * 
   * 通话记录的数据
   * 
   * 1,获取ContentResolver对象 2,ContentResolver对象 通过Uri地址 获取数据 3,展示数据
   * 
   */
  public class MainActivity extends Activity {
  
      private ListView lv;
      private TextView tv;
  
      private ContentResolver contentResolver;
      //content://call_log/calls
      private Uri callUri = CallLog.Calls.CONTENT_URI;
  
      private String [] coumns = new String[]{CallLog.Calls._ID,CallLog.Calls.NUMBER,CallLog.Calls.DATE};
  
  
      //存数据源的集合
      private List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();
  
      SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          lv = (ListView) findViewById(R.id.lv);
          tv = (TextView) findViewById(R.id.tv);
  
          contentResolver = getContentResolver();
  
          //解析器 通过Uri地址获取指定的字段项
          Cursor cursor = contentResolver.query(callUri, 
                  coumns, 
                  null, 
                  null,
                  null);
  
          while(cursor.moveToNext()){
              Map<String, Object> map = new HashMap<String, Object>();
              long id = cursor.getLong(cursor.getColumnIndex(CallLog.Calls._ID));
              String number = cursor.getString(cursor.getColumnIndex(CallLog.Calls.NUMBER));
              long date = cursor.getLong(cursor.getColumnIndex(CallLog.Calls.DATE));
  
  
              map.put("id", id);
              map.put("number", number);
              map.put("date", format.format(date));
  
              list.add(map);
  
          }
  
  
          SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,
                  list, R.layout.item, new String[]{"number","date"}, new int[]{R.id.tv_number,R.id.tv_date});
  
          lv.setAdapter(adapter);
          //如果没有数据  展示VIew
          lv.setEmptyView(tv);
  
      }
  
  }