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);