本科实验报告
课程名称： Android设计与开发
实验项目： Android 课程实验
实验地点： 逸夫楼404
专业班级： 学号：
学生姓名：
指导教师：
年 月 日
太原理工大学学生实验报告
太原理工大学学生实验报告
太原理工大学学生实验报告
太原理工大学学生实验报告
第二篇：Android实验二实验报告
Android实验报告二
姓名：丁军峰
班级：信科12-3
学号：08123448
一、 实验内容
备份通讯录联系人app
二、 实验源程序
1.Activity—main Xml
<LinearLayout
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:orientation="vertical"
>
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="horizontal"
>
<Button
android:id="@+id/bt_query"
android:layout_height="wrap_content"
android:layout_width="0dip"
android:layout_weight="1"
android:text="查询"
android:padding="5dp"
android:textColor="#727272"
android:background="@drawable/recordbutton"
/>
<Button
android:id="@+id/bt_save"
android:layout_height="wrap_content"
android:layout_width="0dip"
android:layout_weight="1"
android:text="保存"
android:padding="5dp"
android:textColor="#727272"
android:background="@drawable/recordbutton"
/>
</LinearLayout>
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
></ListView>
</LinearLayout >
2.MainActivity
package com.example.secondhomework;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlSerializer;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.util.Xml;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
private ListView myListView;
private Button btQuery, btSave;
private ArrayAdapter<String> myArrayAdapter;
private List<String> myList;
String name,number;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myListView = (ListView) findViewById(R.id.lv);
btQuery = (Button) findViewById(R.id.bt_query);
btSave = (Button) findViewById(R.id.bt_save);
myList = new ArrayList<String>();
myArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myList);
myListView.setAdapter(myArrayAdapter);
btQuery.setOnClickListener(this);
btSave.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bt_query:
myList.clear();
query();
myArrayAdapter.notifyDataSetChanged();
break;
case R.id.bt_save:
if(myList.isEmpty()) query();
XmlSerializer serializer = Xml.newSerializer();
try {
File file = new File(this.getFilesDir(), "contacts.xml");
FileOutputStream fos = new FileOutputStream(file);
serializer.setOutput(fos, "utf-8");
serializer.startDocument("utf-8", true);
serializer.startTag(null, "contacts");
for (int i = 0; i < myList.size(); i++) {
String str = myList.get(i);
serializer.startTag(null, "person");
serializer.startTag(null, "name");
serializer.text(str.substring(0, str.indexOf("\n")-1));
serializer.endTag(null, "name");
serializer.startTag(null, "number");
serializer.text(str.substring(str.indexOf("\n")+1, str.length()));
serializer.endTag(null, "number");
serializer.endTag(null, "person");
}
serializer.endTag(null, "contacts");
serializer.endDocument();
fos.close();
Toast.makeText(this, "保存成功", Toast.LENGTH_SHORT).show();
}catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();
}
break;
}
}
private void query() {
ContentResolver myResolver = getContentResolver();
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri dataUri = Uri.parse("content://com.android.contacts/data");
Cursor cursor = myResolver.query(uri, null, null, null, null);
while(cursor.moveToNext()){
String id = cursor.getString(cursor.getColumnIndex("contact_id"));
Cursor dataCursor = myResolver.query(dataUri, null, "raw_contact_id=?", new String[]{id}, null);
while (dataCursor.moveToNext()) {
String data1 = dataCursor.getString(dataCursor.getColumnIndex("data1"));
String mimetype = dataCursor.getString(dataCursor.getColumnIndex("mimetype"));
if(mimetype.equals("vnd.android.cursor.item/name"))
name = data1;
else if(mimetype.equals("vnd.android.cursor.item/phone_v2"))
number = data1;
}
dataCursor.close();
myList.add(name+":\n"+number);
}
cursor.close();
}
}
4.Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.secondhomework"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<uses-permission android:name="android.permission.WRITE_CONTACTS"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
三、 实验结果
程序界面显示
