android中打印函数调用栈、内存使用、屏幕分辨率

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1、打印当前函数调用栈。

java.util.Map<Thread, StackTraceElement[]> ts = Thread.getAllStackTraces();

StackTraceElement[] ste = ts.get(Thread.currentThread());
for (StackTraceElement s : ste) {
android.util.Slog.e("SS ", s.toString()); //这个是android自带的，如果没有，用其他的打印函数一样
}

2、打印当前使用内存和剩余内存
Log.i("DragLayer", "NativeHeapSizeTotal:"+(android.os.Debug.getNativeHeapSize()) + "bytes");
Log.i("DragLayer", "NativeAllocatedHeapSize:"+(android.os.Debug.getNativeHeapAllocatedSize()) + "bytes");
Log.i("DragLayer", "NativeAllocatedFree:"+(android.os.Debug.getNativeHeapFreeSize()) + "bytes");

3、打印手机屏幕分辨率

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
Log.i("Launcher--------", "--------------width = " + dm.widthPixels + "----height = " + dm.heightPixels);

4、打印android系统中单个应用使用内存上限

ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
Log.i("LaucnherApplication", "before----------------------------------------mem up limit = " + activityManager.getMemoryClass());

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