Android几种自定义view，优化UI

一，自定义listview，gridview，实现在scrollview中的滚动，重写onMeasure方法，使listview，gridview不能自身滑动

核心代码：

public class MyListView extends ListView{

public MyListView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public MyListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
       MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
}

二、自定义弹出进度对话框progressdialog

核心代码：

    public static CustomProgressDialog createDialog(Context context) {

        mCustomProgressDialog = new CustomProgressDialog(context,
                R.style.CustomProgressDialog);
        mCustomProgressDialog.setContentView(R.layout.progressdialog_style);
        mCustomProgressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
        return mCustomProgressDialog;
    }
    //为dialog中的imageview添加帧动画
    public void onWindowFocusChanged(boolean hasFocus) {

        if (mCustomProgressDialog == null) {
            return;
        }
        ImageView imageView = (ImageView) mCustomProgressDialog
                .findViewById(R.id.image_loading_view);
        AnimationDrawable animationDrawable = (AnimationDrawable) imageView
                .getBackground();
        animationDrawable.start();
    }

    public CustomProgressDialog setMessage(String strMessage) {


        TextView tvMsg = (TextView) mCustomProgressDialog
                .findViewById(R.id.text_loading_msg);

        if (tvMsg != null) {
            tvMsg.setText(strMessage);
        }

        return mCustomProgressDialog;
    }

三、自定义进度条progressbar

更改进度条的背景：

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">  
   <item android:id="@android:id/background"
       android:drawable="@drawable/progress_bg_holo_dark"
       >        
   </item>  
<item android:id="@android:id/secondaryProgress">
        <clip android:drawable="@drawable/progress_secondary_holo_dark"/>
    </item>      
   <item android:id="@android:id/progress"
       >  

<clip android:drawable="@drawable/progress_primary_holo_dark">            
        </clip>
   </item>  
 </layer-list> 

更改thumb的样式：

   <!-- 按下状态 --> 
    <item    
        android:state_pressed="true"    
        android:drawable="@drawable/seek_thumb" />   
             
    <!-- 普通无焦点状态 --> 
    <item    
        android:state_focused="false"    
        android:state_pressed="false"  
        
        android:drawable="@drawable/seek_thumb" />

四、自定义notifycation通知栏

核心代码：

//设置RemoteViews内容,layoutId自己定义
remoteViews=new RemoteViews(activity.getPackageName(),R.layout.music_notification);
//点击通知返回主界面，通过隐式intent给通知栏中的view添加单击事件
Intent intentBack=new Intent(activity,MainActivity.class);
PendingIntent pIntent=PendingIntent.getActivity(activity, 0, intentBack, 0);
remoteViews.setOnClickPendingIntent(R.id.song_pic, pIntent);
builder.setContent(remoteViews);
builder.setSmallIcon(R.drawable.app_icon);
builder.setTicker("简单云音乐正在播放");
Notification mNotification=builder.build();
//获得完整的通知栏布局(没有这行代码，通知栏显示的是Android默认的高度，加载不完整)
mNotification.bigContentView=remoteViews;
nManager.notify(0, mNotification);