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▪java int门类的数据转换为byte[]类型的数据 java int类型的数据转换为byte[]类型的数据
public static byte[] int32ToBytes(int val) {
int size = Integer.SIZE / Byte.SIZE;
byte[] ret = new byte[size];
for (int i = 0; i < size; ++i) {
ret[i] = (byte) (val << (8 * i) &g.........
▪ PopMenu成效的学习 PopMenu效果的学习
PopMenu效果的学习
看到很多的程序里面都用了PopMenu的效果，给人的体验非常好，今天也学着做了一个，效果如下：
PopMenu.java
[java] view plaincopy
public class PopMenu exten.........
▪ 获取系统中运作的软件 获取系统中运行的软件
mActivityManager = (ActivityManager)EX05_21.this.getSystemService(ACTIVITY_SERVICE);
//最多获取 100 个运行信息
List<ActivityManager.RunningTaskInfo> mRunningTasks = mActivityManager.getRunningTasks(100).........
[1]java int门类的数据转换为byte[]类型的数据
来源: 互联网 发布时间: 2014-02-18
java int类型的数据转换为byte[]类型的数据
代码短，但是非常有用，精简才是王道。和大家分享一下。
public static byte[] int32ToBytes(int val) {
int size = Integer.SIZE / Byte.SIZE;
byte[] ret = new byte[size];
for (int i = 0; i < size; ++i) {
ret[i] = (byte) (val << (8 * i) >> 56);
}
return ret;
}
代码短，但是非常有用，精简才是王道。和大家分享一下。
[2] PopMenu成效的学习
来源: 互联网 发布时间: 2014-02-18
PopMenu效果的学习
public class PopMenu extends Activity {
private int SCREEN_WIDTH;
private int SCREEN_HEIGHT;
private final static int MENU_CREATE_DIRECTORY = 0;
private final static int MENU_CREATE_FILE = 1;
private final static int MENU_PASTE = 2;
public final static int MENU_SEARCH = 3;
private final static int MENU_SHOW_COPY_DIALOG = 4;
private final static int MENU_APK_MANAGER = 5;
private final static int MENU_SETTING = 6;
private final static int MENU_SET_VIEW_STYLE = 7;
private final static int MENU_FILE_LIB = 8;
private final static int MENU_FINISH_ACTIVITY = 9;
private LinearLayout appMenu;
private Animation menuShowAnimation;
private Animation menuHideAnimation;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SCREEN_WIDTH = getResources().getDisplayMetrics().widthPixels;
SCREEN_HEIGHT = getResources().getDisplayMetrics().heightPixels;
initAppMenu();
}
private void initAppMenu() {
appMenu = (LinearLayout) findViewById(R.id.appMenu);
LinearLayout row = (LinearLayout) appMenu.findViewById(R.id.appRow1);
int[] drRes = { R.drawable.newfolder, R.drawable.newfile,
R.drawable.paste, R.drawable.search, R.drawable.dialog,
R.drawable.apkmanager, R.drawable.setting, R.drawable.multicon,
R.drawable.filelib, R.drawable.close };
String[] names = getResources().getStringArray(R.array.appnames);
LayoutInflater inflater = getLayoutInflater();
View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
appMenuOnClick(v.getId());
hideAppMenu();
}
};
for (int i = 0; i < 10; i++) {
if (i == 5) {
row = (LinearLayout) appMenu.findViewById(R.id.appRow2);
}
RelativeLayout rowItem = (RelativeLayout) inflater.inflate(
R.layout.appmenuitem, null);
ImageButton icon = (ImageButton) rowItem
.findViewById(R.id.menuicon);
TextView name = (TextView) rowItem.findViewById(R.id.menuname);
icon.setBackgroundResource(drRes[i]);
icon.setId(i);
name.setText(names[i]);
icon.setOnClickListener(listener);
row.addView(rowItem);
}
}
private void appMenuOnClick(int whitch) {
switch (whitch) {
case MENU_CREATE_DIRECTORY:
Toast.makeText(this, "Create Directory", Toast.LENGTH_LONG).show();
break;
case MENU_CREATE_FILE:
Toast.makeText(this, "Create File", Toast.LENGTH_LONG).show();
break;
case MENU_PASTE:
Toast.makeText(this, "Paste", Toast.LENGTH_LONG).show();
break;
case MENU_SEARCH:
Toast.makeText(this, "Search", Toast.LENGTH_LONG).show();
break;
case MENU_FINISH_ACTIVITY:
Toast.makeText(this, "Finish Activity", Toast.LENGTH_LONG).show();
break;
case MENU_SHOW_COPY_DIALOG:
Toast.makeText(this, "Show Copy Dialog", Toast.LENGTH_LONG).show();
break;
case MENU_SETTING:
Toast.makeText(this, "Setting", Toast.LENGTH_LONG).show();
break;
case MENU_SET_VIEW_STYLE:
Toast.makeText(this, "Set View Style", Toast.LENGTH_LONG).show();
break;
default:
break;
}
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int actiton = event.getAction();
int code = event.getKeyCode();
switch (code) {
case KeyEvent.KEYCODE_MENU:
if (actiton == KeyEvent.ACTION_DOWN) {
if (appMenu.getVisibility() == View.INVISIBLE) {
showAppMenu();
} else {
hideAppMenu();
}
}
break;
case KeyEvent.KEYCODE_BACK:
if (appMenu.getVisibility() == View.INVISIBLE) {
hideAppMenu();
}
break;
default:
break;
}
return super.dispatchKeyEvent(event);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (appMenu.getVisibility() == View.VISIBLE) {
int y = (int) event.getRawY();
if (y < SCREEN_HEIGHT - appMenu.getHeight()) {
hideAppMenu();
return true;
}
}
return super.dispatchTouchEvent(event);
}
private void hideAppMenu() {
appMenu.setVisibility(View.INVISIBLE);
if (menuHideAnimation == null) {
menuHideAnimation = AnimationUtils.loadAnimation(this,
R.anim.menuhide);
}
appMenu.startAnimation(menuHideAnimation);
}
private void showAppMenu() {
appMenu.setVisibility(View.VISIBLE);
if (menuShowAnimation == null) {
menuShowAnimation = AnimationUtils.loadAnimation(this,
R.anim.menushow);
}
appMenu.startAnimation(menuShowAnimation);
}
}
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0"
android:toXDelta="0"
android:fromYDelta="120"
android:toYDelta="00"
android:duration="200" />
</set>
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0"
android:toXDelta="0"
android:fromYDelta="00"
android:toYDelta="120"
android:duration="200" />
</set>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/hello" />
<LinearLayout android:id="@+id/appMenu" android:layout_gravity="bottom"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="125dip" android:visibility="visible"
android:background="@drawable/menubackground"
android:layout_alignParentBottom="true">
<LinearLayout android:id="@+id/appRow1"
android:orientation="horizontal" android:gravity="center_horizontal"
android:layout_gravity="center_horizontal" android:padding="2dip"
android:layout_width="fill_parent" android:layout_height="60dip">
</LinearLayout>
<LinearLayout android:id="@+id/appRow2"
android:orientation="horizontal" android:gravity="center_horizontal"
android:layout_gravity="center_horizontal" android:padding="2dip"
android:layout_width="fill_parent" android:layout_height="60dip">
</LinearLayout>
</LinearLayout>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="60dp"
android:layout_width="60dp"
android:gravity="center_horizontal">
<ImageButton android:id="@+id/menuicon"
android:layout_height="60dp" android:layout_width="60dp"
android:gravity="center_horizontal"
android:layout_alignParentBottom="true" />
<TextView android:id="@+id/menuname"
android:layout_height="60dp"
android:layout_width="60dp" android:singleLine="true"
android:textSize="12dp" android:textColor="#ff000000"
android:paddingTop="40dp" android:gravity="center_horizontal"
android:layout_alignParentBottom="true" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, PopMenu!</string>
<string name="app_name">PopMenu</string>
<string-array name="appnames">
<item>新建文件夹</item>
<item>新建文件</item>
<item>粘贴</item>
<item>搜索</item>
<item>复制对话框</item>
<item>APK管理</item>
<item>设置</item>
<item>图标</item>
<item>文件库</item>
<item>退出</item>
</string-array>
</resources>
PopMenu效果的学习
看到很多的程序里面都用了PopMenu的效果，给人的体验非常好，今天也学着做了一个，效果如下：
PopMenu.java
[java] view plaincopy
res/anim中对于动画的控制：
menuhide.xml:
[xhtml] view plaincopy
menushow.xml:
[xhtml] view plaincopy
layout/main.xml:
[xhtml] view plaincopy
layout/appmenuitem.xml:
[xhtml] view plaincopy
values/strings.xml:
[xhtml] view plaincopy
做完这个感觉很多的动画效果都是“假的”，是做出来的一种效果。
[3] 获取系统中运作的软件
来源: 互联网 发布时间: 2014-02-18
获取系统中运行的软件
mActivityManager = (ActivityManager)EX05_21.this.getSystemService(ACTIVITY_SERVICE);
//最多获取 100 个运行信息
List<ActivityManager.RunningTaskInfo> mRunningTasks = mActivityManager.getRunningTasks(100);
//循环获取
for (ActivityManager.RunningTaskInfo amTask : mRunningTasks) {
//amTask.baseActivity.getClassName()
//amTask.id
//amTask.process
//amTask.pid
}
1 楼
白云天
2012-09-13
<uses-permission android:name="android.permission.GET_TASKS"></uses-permission>
2 楼
白云天
2012-09-13
获取运行的服务也类似，方法为： getRunningServices(...)
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