android 工具类篇 DeviceUtil

最新推荐文章于 2025-06-23 19:53:23 发布

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最新推荐文章于 2025-06-23 19:53:23 发布

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分类专栏： android 工具类篇文章标签： android 工具类篇

本文链接：https://blog.youkuaiyun.com/u011144203/article/details/40454095

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本文介绍了一个Android平台上的设备工具类，包含屏幕尺寸转换、网络状态检查、设备唯一标识符获取等功能，适用于移动应用开发。

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<pre name="code" class="java">import java.lang.reflect.Field;
import java.lang.reflect.Method;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.Configuration;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;

public class DeviceUtils {

	public static int dip2px(Context context, float dpValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dpValue * scale + 0.5f);
	}

	public static int deviceWidth(Context context) {
		return context.getResources().getDisplayMetrics().widthPixels;
	}

	public static int deviceHeight(Context context) {
		return context.getResources().getDisplayMetrics().heightPixels;
	}

	public static int px2dip(Context context, float pxValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}

	public static boolean isNetworkConnected(Context context) {

		if (context != null) {
			ConnectivityManager mConnectivityManager = (ConnectivityManager) context
					.getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo mNetworkInfo = mConnectivityManager
					.getActiveNetworkInfo();
			if (mNetworkInfo != null) {
				return mNetworkInfo.isAvailable();
			}
		}
		return false;
	}

	public static String getIMEI(Context context) {
		return ((TelephonyManager) context
				.getSystemService(Context.TELEPHONY_SERVICE)).getDeviceId();
	}

	// 通知栏高度
	public static int getStatusBarHeight(Context context) {
		Class<?> c = null;
		Object obj = null;
		Field field = null;
		int x = 0, statusBarHeight = 0;
		try {
			c = Class.forName("com.android.internal.R$dimen");
			obj = c.newInstance();
			field = c.getField("status_bar_height");
			x = Integer.parseInt(field.get(obj).toString());
			statusBarHeight = context.getResources().getDimensionPixelSize(x);
		} catch (Exception e1) {
			e1.printStackTrace();

		}

		return statusBarHeight;

	}

	public static int getVersionCode(Context context) {
		// 获取packagemanager的实例
		PackageManager packageManager = context.getPackageManager();
		// getPackageName()是你当前类的包名，0代表是获取版本信息
		int version = 0;
		try {
			PackageInfo packInfo = packageManager.getPackageInfo(
					context.getPackageName(), 0);

			version = packInfo.versionCode;
		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}
		return version;
	}

	/**
	 * 获取系统的版本号
	 * 
	 * @return
	 */
	public static int getAndroidSDKVersion() {
		int version = android.os.Build.VERSION.SDK_INT;
		return version;
	}

	/**
	 * 判断是否为平板
	 * 
	 * @return
	 */
	public static boolean isPad(Context context) {

		boolean isPad = false;
		if (android.os.Build.VERSION.SDK_INT >= 11) { // honeycomb
			// test screen size, use reflection because isLayoutSizeAtLeast is
			// only available since 11
			Configuration con = context.getResources().getConfiguration();
			try {
				Method mIsLayoutSizeAtLeast = con.getClass().getMethod(
						"isLayoutSizeAtLeast", int.class);
				isPad = (Boolean) mIsLayoutSizeAtLeast.invoke(con,
						0x00000004); // Configuration.SCREENLAYOUT_SIZE_XLARGE
			} catch (Exception e) {
				e.printStackTrace();
				isPad = false;
			}
		}
		return isPad;
	}
}