public class CommonUtil {
public static boolean hasSDCard() {
String status = Environment.getExternalStorageState();
return status.equals(Environment.MEDIA_MOUNTED);
}
/**
* 获取最大内存
*
* @return
*/
public static long getMaxMemory() {
return Runtime.getRuntime().maxMemory() / 1024;
}
/**
* 检查网络
*
* @param context
* @return
*/
public static boolean checkNetState(Context context) {
boolean netstate = false;
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
netstate = true;
break;
}
}
}
}
return netstate;
}
public static void showToast(Context context, String tip) {
Toast.makeText(context, tip, Toast.LENGTH_SHORT).show();
}
public static DisplayMetrics metric = new DisplayMetrics();
/**
* 得到屏幕高度
*
* @param context
* @return
*/
public static int getScreenHeight(Activity context) {
context.getWindowManager().getDefaultDisplay().getMetrics(metric);
return metric.heightPixels;
}
/**
* 得到屏幕宽度
*
* @param context
* @return
*/
public static int getScreenWidth(Activity context) {
context.getWindowManager().getDefaultDisplay().getMetrics(metric);
return metric.widthPixels;
}
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**
* 查询手机内非系统应用
*
* @param context
* @return
*/
public static List getAllApps(Context context) {
List apps = new ArrayList();
PackageManager pManager = context.getPackageManager();
// 获取手机内所有应用
List paklist = pManager.getInstalledPackages(0);
for (int i = 0; i < paklist.size(); i++) {
PackageInfo pak = (PackageInfo) paklist.get(i);
// 判断是否为非系统预装的应用程序
if ((pak.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)