battery

Since there is such a needed concern for an application's battery usage, ram and cpu usage, what is the expense of multiple contentobservers vs. multiple broadcastreceivers? Example 1: A service running with START_STICKY using 5 contentobservers registered/unregistered properly. Example 2: A service being fired from 5 broadcastreceivers set in the manifest. Example 3: A service running with START_STICKY using 5 registered broadcastreceivers. What is the true difference in battery usage/ram/cpu between an observer and a receiver? Can any pros chime in on this? I'm assuming 1 instance wouldn't

I am trying to make draw a circle based on the battery percentage. I have the following code: Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types Bitmap bmp = Bitmap.createBitmap(200, 200, conf); Paint mPaint = new Paint(); mPaint.setDither(true); mPaint.setColor(Color.BLUE); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeJoin(Paint.Join.ROUND); mPaint.setStrokeCap(Paint.Cap.ROUND); mPaint.setStrokeWidth(5); circle = new Path(); circle.addCircle(100, 100, level, Direction.CW); Canvas canvas = new Canvas(bmp); canvas.drawPath(circle, mPaint); I am trying to get similar

This question already has answers here : Getting the battery current values for the Android Phone (8 answers) Closed 6 years ago . The BatteryManager class doesn't have the metric for current: http://developer.android.com/reference/android/os/BatteryManager.html And then I have found this post: Getting the battery current values for the Android Phone It seems that the author also found it was not possible to get such value from the Linux entry. I also downloaded the widget called CurrentWidget into my Nexus 7. For the current value, it shows "no data". So probably a current sensor is required