AppUtils.java
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package com.cnlive.goldenline.util;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.DisplayMetrics;
import android.view.WindowManager;
import com.orhanobut.logger.Logger;
/**
* 跟App相关的辅助类
*/
public class AppUtils {
private AppUtils() {
/**cannot be instantiated **/
throw new UnsupportedOperationException("cannot be instantiated");
}
public static void setAlpha(Activity context, float alpha) {
WindowManager.LayoutParams params = context.getWindow().getAttributes();
params.alpha = alpha;
context.getWindow().setAttributes(params);
}
// public static int getVerSionCode(Context context){
// return getPackageInfo(context).versionCode;
// }
@Nullable
public static PackageInfo getPackageInfo(@NonNull Context context) {
PackageInfo info = null;
try {
info = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
// 当前应用的版本名
String versionName = info.versionName;
// 当前版本的版本号
int versionCode = info.versionCode;
// 当前版本的包
String packageNames = info.packageName;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return info;
}
/**
* 获取应用程序名称
*/
public static String getAppName(@NonNull Context context) {
try {
PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
int labelRes = packageInfo.applicationInfo.labelRes;
return context.getResources().getString(labelRes);
} catch (PackageManager.NameNotFoundException e) {
Logger.e(e.getMessage(), e);
}
return null;
}
/**
* [获取应用程序版本名称信息]
*
* @param context
* @return 当前应用的版本名称
*/
public static String getVersionName(@NonNull Context context) {
try {
PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
return packageInfo.versionName;
} catch (PackageManager.NameNotFoundException e) {
LogUtils.LOGE("AppUtils" + e.getMessage(), e);
}
return null;
}
/**
* [获取应用程序版本名称信息]
*
* @param context
* @return 当前应用的版本名称
*/
public static int getVersionCode(@NonNull Context context) {
try {
PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(
context.getPackageName(), 0);
return packageInfo.versionCode;
} catch (PackageManager.NameNotFoundException e) {
LogUtils.LOGE("AppUtils" + e.getMessage(), e);
}
return 0;
}
/**
* 获取分辨率：宽
*
* @param context
* @return
*/
public static int getScreenWidth(@Nullable Context context) {
int screenWidth = 0;
try {
if (context == null) return 0;
DisplayMetrics dm = new DisplayMetrics();
dm = context.getResources().getDisplayMetrics();
screenWidth = dm.widthPixels;
} catch (Exception ex) {
}
return screenWidth;
}
/**
* 获取分辨率：高
*
* @param context
* @return
*/
public static int getScreenHeight(@Nullable Context context) {
int screenWidth = 0;
try {
if (context == null) return 0;
DisplayMetrics dm = new DisplayMetrics();
dm = context.getResources().getDisplayMetrics();
screenWidth = dm.heightPixels;
} catch (Exception ex) {
}
return screenWidth;
}
}