标签:des android style blog http io ar color os
源码下载地址:http://download.csdn.net/detail/hewence1/8176601
<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">先看一下效果: 显示当前内存使用率55% ,每一秒都刷新一次</span>
实现原理,在Service中创建一个悬浮框就可,在service中每秒钟访问计算一次单曲使用了多少的内存,并更新对应的控件
实现步骤:
1 创建一个Activity,此Activty自启动service即可,当然也可以加上其他界面
Activity代码:
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Intent show = new Intent(this, FloatService.class); startService(show); }Xml代码就不贴了占篇幅,service代码现在也是空的也不贴了。
Manifest文件要注意:
加入权限:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.GET_TASKS"/>
跟service
<service android:name="com.example.testfloating.FloatService"></service>
2. 增加悬浮框
要增加的悬浮框跟上图一样要重写一个圆形的View 并且可以使阴影(现在是使用绿色)来表示百分百,如50% 那么绿色就只有一半。另一半显示背景色
先看这个View的代码:
int width ; int height; int precent; Bitmap mBitmap ; int viewCorol = 0xff00ff00; public CircleView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onDraw(Canvas canvas) { // 先获得一个 bitmap吧 再 super.onDraw(canvas); width = getMeasuredWidth(); height = getMeasuredHeight(); mBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888); Canvas mCanvas = new Canvas(mBitmap); Paint mPaint = new Paint(); mPaint.setColor(viewCorol); mPaint.setAntiAlias(true); mCanvas.drawCircle(width / 2, height / 2, width / 2, mPaint); canvas.drawBitmap(mBitmap, new Rect(0, height * (100 - precent) / 100, width, height) , new Rect(0, height * (100 - precent) / 100, width, height), null); } public void setPrecent(int precent) { this.precent = precent; invalidate(); }方法的实现请自己看代码, 不难理解
在setPrecent就是设计百分百比,这这里可以延伸一下的,
可以加入根据precent的大少来更改阴影的颜色,颜色的值要有一个递变的过程()
public void setPrecent(int precent) { this.precent = precent; if (precent >= 90){ viewColor = ..... }else if (precent >= 80){ viewColor = ..... }else if (precent >= 70){ viewColor = ..... } .precent........ else{ } invalidate(); }
</pre><pre name="code" class="java">现在看布局文件:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/window" > <!-- android:descendantFocusability="blocksDescendants" --> <RelativeLayout android:id="@+id/circle_layout" android:layout_width="50dp" android:layout_height="50dp" android:background="@drawable/window_bg" android:orientation="vertical" > <com.example.textfloatingwindow.CircleView android:id="@+id/window_circle" android:layout_width="40dp" android:layout_height="40dp" android:layout_centerInParent="true" > </com.example.textfloatingwindow.CircleView> <TextView android:id="@+id/precent" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:textColor="#ffffffff" android:textSize="20sp" /> </RelativeLayout> </RelativeLayout>
@Override public void onCreate() { super.onCreate(); createFloatView(); Log.i(TAG , "onCreate"); } @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); mHandler.sendEmptyMessage(HANDLE_CHECK_ACTIVITY); Log.i(TAG , "onStart"); } @SuppressLint("HandlerLeak") private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case HANDLE_CHECK_ACTIVITY: if (!isAdded) { Log.i(TAG , "wm.addView(mainView, params);"); wm.addView(mainView, params); isAdded = true; } mHandler.sendEmptyMessageDelayed(HANDLE_CHECK_ACTIVITY, 1000); break; } } }; /** * 创建悬浮窗 */ private void createFloatView() { wm = (WindowManager) getApplicationContext().getSystemService( Context.WINDOW_SERVICE); params = new WindowManager.LayoutParams(); // 设置window type params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; /* * 如果设置为params.type = WindowManager.LayoutParams.TYPE_PHONE; 那么优先级会降低一些, * 即拉下通知栏不可见 */ params.format = PixelFormat.RGBA_8888; // 设置图片格式,效果为背景透明 // 设置Window flag params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; /* * 下面的flags属性的效果形同“锁定”。 悬浮窗不可触摸,不接受任何事件,同时不影响后面的事件响应。 * wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL | * LayoutParams.FLAG_NOT_FOCUSABLE | LayoutParams.FLAG_NOT_TOUCHABLE; */ // 设置悬浮窗的长得宽 params.width = params.WRAP_CONTENT; params.height = params.WRAP_CONTENT; if (null == inflater){ inflater = LayoutInflater.from(getApplicationContext()); mainView = inflater.inflate(R.layout.window_view, null); precent = (TextView) mainView.findViewById(R.id.precent); circleView = (CircleView) mainView.findViewById(R.id.window_circle); } }在onCreate里创建一个View ,但是没有加入到WindowManager中,在onStart中启动了Handler 每秒钟执行一次
if (!isAdded) { Log.i(TAG , "wm.addView(mainView, params);"); wm.addView(mainView, params); isAdded = true; }通过这个来增加到WindowManager来实现悬浮框。
先的效果如图:
现在悬浮框中啥都没有,只有一个背景,在这里 我只是使用一个shape当做背景,大家可以使用更pl的UI素材。现在的内存使用率是没有显示出来的是没有设置的!
3. 实时监控内存的变化
在Handler中增加这个更新得到的数据:
得到数据数据的方法如下:
/** * 得到系统总内存 单位KB * @param context * @return */ public long getTotalMemory(Context context) { String str1 = "/proc/meminfo";// 系统内存信息文件 String str2; String[] arrayOfString; long initial_memory = 0; try { FileReader localFileReader = new FileReader(str1); BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192); str2 = localBufferedReader.readLine();// 读取meminfo第一行,系统总内存大小 arrayOfString = str2.split("\\s+"); /* for (String num : arrayOfString) { Log.i(str2, num + "\t"); }*/ initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存,单位是KB,乘以1024转换为Byte localBufferedReader.close(); } catch (IOException e) { } return initial_memory; } public long getAvailMemory(Context context) {// 获取android当前可用内存大小 ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); MemoryInfo mi = new MemoryInfo(); am.getMemoryInfo(mi); return mi.availMem; } private int getPrecent(){ long totalSize = getTotalMemory(getApplicationContext()); long aliSize = getAvailMemory(getApplicationContext()); int precent = 100 - (int) (aliSize * 100 / (float)totalSize); return precent; } Handler修改为:
<pre name="code" class="java">@SuppressLint("HandlerLeak") private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case HANDLE_CHECK_ACTIVITY: if (!isAdded) { Log.i(TAG , "wm.addView(mainView, params);"); wm.addView(mainView, params); isAdded = true; } <span style="background-color: rgb(255, 153, 0);"> precent.setText(getPrecent() + "%"); circleView.setPrecent(getPrecent());</span> mHandler.sendEmptyMessageDelayed(HANDLE_CHECK_ACTIVITY, 1000); break; } } };
机器的任何都是有它的存在的,所有就实现了实时监听
// 设置悬浮窗的Touch监听 mainView.setOnTouchListener(new OnTouchListener() { int lastX, lastY; int paramX, paramY; public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); paramX = params.x; paramY = params.y; break; case MotionEvent.ACTION_MOVE: int dx = (int) event.getRawX() - lastX; int dy = (int) event.getRawY() - lastY; params.x = paramX + dx; params.y = paramY + dy; // 更新悬浮窗位置 wm.updateViewLayout(mainView, params); break; } // return true的 click事件是没有反应的,至于为什么 大家去了解触摸事件分发与处理 就知道了 return false; } });
/** 获得属于桌面的应用的应用包名称 * * @return 返回包含所有包名的字符串列表 */ private List<String> getHomes() { List<String> names = new ArrayList<String>(); PackageManager packageManager = this.getPackageManager(); // 属性 Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities( intent, PackageManager.MATCH_DEFAULT_ONLY); for (ResolveInfo ri : resolveInfo) { names.add(ri.activityInfo.packageName); } return names; } /** * 判断当前界面是否是桌面 */ public boolean isHome() { if (mActivityManager == null) { mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); } List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1); return homeList.contains(rti.get(0).topActivity.getPackageName()); }
@SuppressLint("HandlerLeak") private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case HANDLE_CHECK_ACTIVITY: if (isHome()){ if (!isAdded) { Log.i(TAG , "wm.addView(mainView, params);"); wm.addView(mainView, params); isAdded = true; } // 只有主界面才更新 precent.setText(getPrecent() + "%"); circleView.setPrecent(getPrecent()); }else{ if (isAdded){ wm.removeView(mainView); isAdded = false; } } mHandler.sendEmptyMessageDelayed(HANDLE_CHECK_ACTIVITY, 1000); break; } } };
</pre><pre name="code" class="java">@Override public void onCreate() { super.onCreate(); homeList = getHomes(); createFloatView(); Log.i(TAG , "onCreate"); }
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/window" android:layout_width="match_parent" android:layout_height="match_parent" > <RelativeLayout android:id="@+id/circle_layout" android:layout_width="50dp" android:layout_height="50dp" android:background="@drawable/window_bg" android:orientation="vertical" > <com.example.textfloatingwindow.CircleView android:id="@+id/window_circle" android:layout_width="40dp" android:layout_height="40dp" android:layout_centerInParent="true" > </com.example.textfloatingwindow.CircleView> <TextView android:id="@+id/precent" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:textColor="#ffffffff" android:textSize="20sp" /> </RelativeLayout> <LinearLayout android:id="@+id/menu_layout" android:layout_width="80dp" android:layout_height="60dp" android:layout_toRightOf="@id/circle_layout" android:visibility="gone" android:orientation="vertical" > <TextView android:id="@+id/menu0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="打开应用" /> <TextView android:id="@+id/menu1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="返回" /> <TextView android:id="@+id/menu2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="退出悬浮框" /> </LinearLayout> </RelativeLayout>
menu0.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent it = new Intent(FloatService.this , MainActivity.class); it.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(it); } }); menu1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { menu.setVisibility(View.GONE); } }); menu2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { isAdded = false; wm.removeView(mainView); // 记得要移动掉handler 否则还是一秒运行一次 mHandler.removeMessages(HANDLE_CHECK_ACTIVITY); stopSelf(); } });效果如下:
标签:des android style blog http io ar color os
原文地址:http://blog.csdn.net/hewence1/article/details/41282949