20.Android(安卓)设备工具DeviceUtil
16lz
2021-01-26
20.Android 设备工具DeviceUtil
- Android 设备工具DeviceUtil
- dp转换px
- px转换dp
- 设备宽度
- 设备高度
- SD卡判断
- 网络判断
- VersionName
- VersionCode
- DeviceId
- 手机品牌
- 手机型号
- 系统Android API等级
- 系统Android 版本
- App进程id
- App进程Name
- 创建App缓存文件夹
- Uri转换File
- 获取AndroidManifestxml里meta data的值
- DeviceUtil全部源码
dp转换px
在自定义View中必须用到这个方法。自定义View的时候,不能像在xml那样可以设置dp(密度),只能设置px(像素)。不同分辨率的设备,设置px,显示就不会一样了。为了结合设计图设置dp,需要将dp转换为px值,然后再设置。
/** * dp 转化为 px * @param context * @param dpValue * @return */ public static int dp2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); }
px转换dp
/** * px 转化为 dp * @param context * @param pxValue * @return */ public static int px2dp(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f); }
设备宽度
/** * 获取设备宽度(px) * @param context * @return */ public static int deviceWidth(Context context) { return context.getResources().getDisplayMetrics().widthPixels; }
设备高度
/** * 获取设备高度(px) * @param context * @return */ public static int deviceHeight(Context context) { return context.getResources().getDisplayMetrics().heightPixels; }
SD卡判断
/** * SD卡判断 * @return */ public static boolean isSDCardAvailable() { return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); }
网络判断
/** * 是否有网 * @param context * @return */ 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; }
VersionName
对应build.gradle中的versionName
/** * 返回版本名字 * 对应build.gradle中的versionName * * @param context * @return */ public static String getVersionName(Context context) { String versionName = ""; try { PackageManager packageManager = context.getPackageManager(); PackageInfo packInfo = packageManager.getPackageInfo(context.getPackageName(), 0); versionName = packInfo.versionName; } catch (Exception e) { e.printStackTrace(); } return versionName; }
VersionCode
对应build.gradle中的versionCode
/** * 返回版本号 * 对应build.gradle中的versionCode * * @param context * @return */ public static String getVersionCode(Context context) { String versionCode = ""; try { PackageManager packageManager = context.getPackageManager(); PackageInfo packInfo = packageManager.getPackageInfo(context.getPackageName(), 0); versionCode = String.valueOf(packInfo.versionCode); } catch (Exception e) { e.printStackTrace(); } return versionCode; }
DeviceId
每台设备都有唯一的标识,这就是DeviceId
/** * 获取设备的唯一标识,deviceId * * @param context * @return */ public static String getDeviceId(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); String deviceId = tm.getDeviceId(); if (deviceId == null) { return "-"; } else { return deviceId; } }
手机品牌
/** * 获取手机品牌 * * @return */ public static String getPhoneBrand() { return android.os.Build.BRAND; }
手机型号
/** * 获取手机型号 * * @return */ public static String getPhoneModel() { return android.os.Build.MODEL; }
系统Android API等级
/** * 获取手机Android API等级(22、23 ...) * * @return */ public static int getBuildLevel() { return android.os.Build.VERSION.SDK_INT; }
系统Android 版本
/** * 获取手机Android 版本(4.4、5.0、5.1 ...) * * @return */ public static String getBuildVersion() { return android.os.Build.VERSION.RELEASE; }
App进程id
/** * 获取当前App进程的id * * @return */ public static int getAppProcessId() { return android.os.Process.myPid(); }
App进程Name
/** * 获取当前App进程的Name * * @param context * @param processId * @return */ public static String getAppProcessName(Context context, int processId) { String processName = null; ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); // 获取所有运行App的进程集合 List l = am.getRunningAppProcesses(); Iterator i = l.iterator(); PackageManager pm = context.getPackageManager(); while (i.hasNext()) { ActivityManager.RunningAppProcessInfo info = (ActivityManager.RunningAppProcessInfo) (i.next()); try { if (info.pid == processId) { CharSequence c = pm.getApplicationLabel(pm.getApplicationInfo(info.processName, PackageManager.GET_META_DATA)); processName = info.processName; return processName; } } catch (Exception e) { Log.e(DeviceUtil.class.getName(), e.getMessage(), e); } } return processName; }
创建App缓存文件夹
/** * 创建App文件夹 * * @param appName * @param application * @return */ public static String createAPPFolder(String appName, Application application) { return createAPPFolder(appName, application, null); } /** * 创建App文件夹 * * @param appName * @param application * @param folderName * @return */ public static String createAPPFolder(String appName, Application application, String folderName) { File root = Environment.getExternalStorageDirectory(); File folder; /** * 如果存在SD卡 */ if (DeviceUtil.isSDCardAvailable() && root != null) { folder = new File(root, appName); if (!folder.exists()) { folder.mkdirs(); } } else { /** * 不存在SD卡,就放到缓存文件夹内 */ root = application.getCacheDir(); folder = new File(root, appName); if (!folder.exists()) { folder.mkdirs(); } } if (folderName != null) { folder = new File(folder, folderName); if (!folder.exists()) { folder.mkdirs(); } } return folder.getAbsolutePath(); }
Uri转换File
/** * 通过Uri找到File * * @param context * @param uri * @return */ public static File uri2File(Activity context, Uri uri) { File file; String[] project = {MediaStore.Images.Media.DATA}; Cursor actualImageCursor = context.getContentResolver().query(uri, project, null, null, null); if (actualImageCursor != null) { int actual_image_column_index = actualImageCursor .getColumnIndexOrThrow(MediaStore.Images.Media.DATA); actualImageCursor.moveToFirst(); String img_path = actualImageCursor .getString(actual_image_column_index); file = new File(img_path); } else { file = new File(uri.getPath()); } if (actualImageCursor != null) actualImageCursor.close(); return file; }
获取AndroidManifest.xml里meta data的值
AndroidManifest.xml
比如自定义了一个meta-data
,名为DEBUG。
<meta-data android:name="DEBUG" android:value="${DEBUG}" />
build.gradle
然后在build.gradle里给这个DEBUG赋值了。
//渠道Flavors productFlavors { APPTest { applicationId "com.zyy.camnter.newlife" manifestPlaceholders = [DEBUG : "debug"] } }
可以通过一下方法取得AndroidManifest.xml里DEBUG被赋上的值:
/** * 获取AndroidManifest.xml里 <meta-data>的值 * * @param context * @param name * @return */ public static String getMetaData(Context context, String name) { String value = null; try { ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA); value = appInfo.metaData.getString(name); } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } return value; }
DeviceUtil全部源码
public class DeviceUtil { /** * dp 转化为 px * * @param context * @param dpValue * @return */ public static int dp2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } /** * px 转化为 dp * * @param context * @param pxValue * @return */ public static int px2dp(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f); } /** * 获取设备宽度(px) * * @param context * @return */ public static int deviceWidth(Context context) { return context.getResources().getDisplayMetrics().widthPixels; } /** * 获取设备高度(px) * * @param context * @return */ public static int deviceHeight(Context context) { return context.getResources().getDisplayMetrics().heightPixels; } /** * SD卡判断 * * @return */ public static boolean isSDCardAvailable() { return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); } /** * 是否有网 * * @param context * @return */ 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; } /** * 返回版本名字 * 对应build.gradle中的versionName * * @param context * @return */ public static String getVersionName(Context context) { String versionName = ""; try { PackageManager packageManager = context.getPackageManager(); PackageInfo packInfo = packageManager.getPackageInfo(context.getPackageName(), 0); versionName = packInfo.versionName; } catch (Exception e) { e.printStackTrace(); } return versionName; } /** * 返回版本号 * 对应build.gradle中的versionCode * * @param context * @return */ public static String getVersionCode(Context context) { String versionCode = ""; try { PackageManager packageManager = context.getPackageManager(); PackageInfo packInfo = packageManager.getPackageInfo(context.getPackageName(), 0); versionCode = String.valueOf(packInfo.versionCode); } catch (Exception e) { e.printStackTrace(); } return versionCode; } /** * 获取设备的唯一标识,deviceId * * @param context * @return */ public static String getDeviceId(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); String deviceId = tm.getDeviceId(); if (deviceId == null) { return "-"; } else { return deviceId; } } /** * 获取手机品牌 * * @return */ public static String getPhoneBrand() { return android.os.Build.BRAND; } /** * 获取手机型号 * * @return */ public static String getPhoneModel() { return android.os.Build.MODEL; } /** * 获取手机Android API等级(22、23 ...) * * @return */ public static int getBuildLevel() { return android.os.Build.VERSION.SDK_INT; } /** * 获取手机Android 版本(4.4、5.0、5.1 ...) * * @return */ public static String getBuildVersion() { return android.os.Build.VERSION.RELEASE; } /** * 获取当前App进程的id * * @return */ public static int getAppProcessId() { return android.os.Process.myPid(); } /** * 获取当前App进程的Name * * @param context * @param processId * @return */ public static String getAppProcessName(Context context, int processId) { String processName = null; ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); // 获取所有运行App的进程集合 List l = am.getRunningAppProcesses(); Iterator i = l.iterator(); PackageManager pm = context.getPackageManager(); while (i.hasNext()) { ActivityManager.RunningAppProcessInfo info = (ActivityManager.RunningAppProcessInfo) (i.next()); try { if (info.pid == processId) { CharSequence c = pm.getApplicationLabel(pm.getApplicationInfo(info.processName, PackageManager.GET_META_DATA)); processName = info.processName; return processName; } } catch (Exception e) { Log.e(DeviceUtil.class.getName(), e.getMessage(), e); } } return processName; } /** * 创建App文件夹 * * @param appName * @param application * @return */ public static String createAPPFolder(String appName, Application application) { return createAPPFolder(appName, application, null); } /** * 创建App文件夹 * * @param appName * @param application * @param folderName * @return */ public static String createAPPFolder(String appName, Application application, String folderName) { File root = Environment.getExternalStorageDirectory(); File folder; /** * 如果存在SD卡 */ if (DeviceUtil.isSDCardAvailable() && root != null) { folder = new File(root, appName); if (!folder.exists()) { folder.mkdirs(); } } else { /** * 不存在SD卡,就放到缓存文件夹内 */ root = application.getCacheDir(); folder = new File(root, appName); if (!folder.exists()) { folder.mkdirs(); } } if (folderName != null) { folder = new File(folder, folderName); if (!folder.exists()) { folder.mkdirs(); } } return folder.getAbsolutePath(); } /** * 通过Uri找到File * * @param context * @param uri * @return */ public static File uri2File(Activity context, Uri uri) { File file; String[] project = {MediaStore.Images.Media.DATA}; Cursor actualImageCursor = context.getContentResolver().query(uri, project, null, null, null); if (actualImageCursor != null) { int actual_image_column_index = actualImageCursor .getColumnIndexOrThrow(MediaStore.Images.Media.DATA); actualImageCursor.moveToFirst(); String img_path = actualImageCursor .getString(actual_image_column_index); file = new File(img_path); } else { file = new File(uri.getPath()); } if (actualImageCursor != null) actualImageCursor.close(); return file; } /** * 获取AndroidManifest.xml里 <meta-data>的值 * * @param context * @param name * @return */ public static String getMetaData(Context context, String name) { String value = null; try { ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA); value = appInfo.metaData.getString(name); } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } return value; }}
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