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sunwei_07 — Tue, 15 Feb 2011 03:27:00 GMT

1.在raw目录放一个mp3文�g�Q�test.mp3;

2.��Z��个MediaPlay的Service文�gMusicService.java

public class MusicService extends Service
{
//MediaPlayer对象
private MediaPlayer player;

public IBinder onBind(Intent arg0)
{
return null;
}

public void onStart(Intent intent, int startId)
{
  super.onStart(intent, startId);
  //�q�里可以理解��载音乐文�?br />   player = MediaPlayer.create(this, R.raw.test);
  //开始播�?br />   player.start();
}

public void onDestroy()
{
  super.onDestroy();
  //停止音乐-停止Service
  player.stop();
}

}

3.��L��?/p>

public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  //从main.xml布局中获得Button对象
  Button button_start = (Button)findViewById(R.id.start);
  Button button_stop = (Button)findViewById(R.id.stop);
  //讄��按钮�Q�Button�Q�监�?br />   button_start.setOnClickListener(start);
        button_stop.setOnClickListener(stop);

}

//开始按�?br /> private OnClickListener start = new OnClickListener()
    {
        public void onClick(View v)
        {
        //开启Service
            startService(new Intent("com.yarin.Android.MUSIC"));
        }
    };
   //停止按钮
    private OnClickListener stop = new OnClickListener()
    {
        public void onClick(View v)
        {
        //停止Service
            stopService(new Intent("com.yarin.Android.MUSIC"));
        }
    };

sunwei_07 2011-02-15 11:27 发表评论

sunwei_07 — Tue, 15 Feb 2011 03:26:00 GMT

public void onCreate(Bundle savedInstanceState)
{
  TextView tv = new TextView(this);
  String string = "";
  super.onCreate(savedInstanceState);
  //得到ContentResolver对象
        ContentResolver cr = getContentResolver();
        //取得电话本中开始一��的光标
        Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        //向下�U�d��一下光�?br />         while(cursor.moveToNext())
        {
        //取得联系人名�?br />         int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);
        String contact = cursor.getString(nameFieldColumnIndex);
        //取得电话��L��
        int numberFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.NUMBER);
        String number = cursor.getString(numberFieldColumnIndex);

        string += (contact+":"+number+"\n");
        }
        cursor.close();
  //讄��TextView昄��的内�?br />   tv.setText(string);
  //昄��到屏�q?br />   setContentView(tv);
}

sunwei_07 2011-02-15 11:26 发表评论

Android基础教程(�?�?----- Activity �H�口切换

sunwei_07 — Tue, 15 Feb 2011 03:25:00 GMT

首先在layout里徏2个xml文�g

分别有按�?和按�?

JAVA代码�Q?/p>

1.public class Activity01 extends Activity
{
public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  /* 讄��昄��main.xml布局 */
  setContentView(R.layout.main);
  /* findViewById(R.id.button1)取得布局main.xml中的button1 */
  Button button = (Button) findViewById(R.id.button1);
  /* 监听button的事件信�?*/
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v)
   {
    /* 新徏一个Intent对象 */
    Intent intent = new Intent();
    /* 指定intent要启动的�c?*/
    intent.setClass(Activity01.this, Activity02.class);
    /* 启动一个新的Activity */
    startActivity(intent);
    /* 关闭当前的Activity */
    Activity01.this.finish();
   }
  });
}
}

2.public class Activity02 extends Activity
{
public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  /* 讄��昄��main2.xml布局 */
  setContentView(R.layout.main2);
  /* findViewById(R.id.button2)取得布局main.xml中的button2 */
  Button button = (Button) findViewById(R.id.button2);
  /* 监听button的事件信�?*/
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v)
   {
    /* 新徏一个Intent对象 */
    Intent intent = new Intent();
    /* 指定intent要启动的�c?*/
    intent.setClass(Activity02.this, Activity01.class);
    /* 启动一个新的Activity */
    startActivity(intent);
    /* 关闭当前的Activity */
    Activity02.this.finish();
   }
  });
}
}

sunwei_07 2011-02-15 11:25 发表评论

Android基础教程(�?�?-----更改手机�H�口画面底色

sunwei_07 — Tue, 15 Feb 2011 03:24:00 GMT

1.string.xml

Hello World, ActivityMain!
ActivityMain
账号:
密码:

2自定义的.drawable.xml

#ffffff
#938192
#7cd12e

3.main.xml

android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/color1">
android:id="@+id/myTextViewName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/name"
android:textColor="@color/color2"
android:layout_x="61px"
android:layout_y="69px"
/>
android:id="@+id/myTextViewPass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pass"
android:textColor="@color/color2"
android:layout_x="61px"
android:layout_y="158px"
/>
android:id="@+id/myEditTextName"
android:layout_width="130dip"
android:layout_height="wrap_content"
android:textSize="18sp"
android:layout_x="114px"
android:layout_y="57px"
/>
android:id="@+id/myEditTextPass"
android:layout_width="130dip"
android:layout_height="wrap_content"
android:textSize="18sp"
android:password="true"
android:layout_x="112px"
android:layout_y="142px"
/>

4.ActivityMain.java

package org.Gofe.drawable;

import android.app.Activity;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.TextView;

public class ActivityMain extends Activity {
/** Called when the activity is first created. */
private TextView myTextViewName;
private TextView myTextViewPass;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//由ID获得对象
myTextViewName=(TextView)findViewById(R.id.myTextViewName);
myTextViewPass=(TextView)findViewById(R.id.myTextViewPass);
//getBaseContext获得基础Context,getResources获得资源
Resources myColor=getBaseContext().getResources();
//��p��源myColor获得Drawable,R.color.color3是颜色值id的引�?/span>
Drawable color_N=myColor.getDrawable(R.color.color3);
Drawable color_P=myColor.getDrawable(R.color.color3);
//讄��背景
myTextViewName.setBackgroundDrawable(color_N);
myTextViewPass.setBackgroundDrawable(color_P);

}
}

sunwei_07 2011-02-15 11:24 发表评论

sunwei_07 — Tue, 15 Feb 2011 02:02:00 GMT

首先我们是在res->values->string.xml里面加了如下一�?黑体):

xml version="1.0" encoding="utf-8"?>

<string name="hello">Hello World, HelloAndroidstring>

<string name="app_name">HelloAndroidstring>

<string name="textView_text">�Ƣ迎来到博客string>

resources>

而加�?�Ƣ迎来到博客"是在main.xml (定义手机布局界面�?里加入的,如下面代�?其中我们闺将@string/hello �Ҏ��了@string/textView_text .

xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/textView_text" /> LinearLayout>

�q�样我们�q�行HelloAndroid.java�?手机画面里将昄��"�Ƣ迎来到博客"的欢�q�界�?貌似我们又是没有写代�?只是�?xml加了一两行搞定,对习惯了�~�程的同�?感觉有点不适应.其实在HelloAndroid.java写代码也可以完全辑ֈ�一��L��效果.

在这里我们首先将main.xml回归到原样在原样的基��上加上一行见下方(黑体�?�q�里ID是�ؓ了在Java�c�里,扑ֈ�TextView对象,�q�且可以控制�?

xml version="1.0" encoding="utf-8"?>

LinearLayout>

在主�E�序HelloAndroid.java里代码如�?

package com.android.test;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

public class HelloAndroid extends Activity {

private TextView myTextView;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState); //载入main.xml Layout,此时myTextView:text为hello

setContentView(R.layout.main); //使用findViewById函数,利用ID扑ֈ�该TextView对象

myTextView = (TextView)findViewById(R.id.myTextView);

String welcome_mes = "�Ƣ迎来到博客"; //利用setText�Ҏ��TextView文字改变为welcom_mes

myTextView.setText(welcome_mes);

}

sunwei_07 2011-02-15 10:02 发表评论