Android 系統工具類SystemUtils收集整理（持續更新），androidsystemutils

Android 系統工具類SystemUtils收集整理（持續更新），androidsystemutils

最近做的功能中涉及到了一些關於系統方面的東西，自己摸索以及網上搜集整理出來了一個工具類方便調用

包含的功能有：

擷取系統中所有APP應用、擷取使用者安裝的APP應用、根據包名和Activity啟動類查詢應用資訊、跳轉到WIFI設定、WIFI網路開關、移動網路開關、GPS開關 當前若關則開啟 當前若開則關閉、調節系統音量、設定亮度、擷取螢幕的亮度、跳轉到系統設定、擷取檔案夾下所有檔案、擷取視頻的縮圖 、開啟視頻檔案...

工具類會持續更新，與大家共同學習進步。

SystemUtils.java

package com.player.utils;import java.io.File;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.Collections;import java.util.List;import android.app.Activity;import android.app.PendingIntent;import android.app.PendingIntent.CanceledException;import android.content.ComponentName;import android.content.ContentResolver;import android.content.Context;import android.content.Intent;import android.content.pm.ActivityInfo;import android.content.pm.ApplicationInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.content.pm.ResolveInfo;import android.graphics.Bitmap;import android.graphics.drawable.Drawable;import android.media.AudioManager;import android.media.ThumbnailUtils;import android.net.ConnectivityManager;import android.net.Uri;import android.net.wifi.WifiManager;import android.provider.Settings;import com.player.bean.AppInfo;public class SystemUtils {/** * 擷取系統所有APP應用 *  * @param context */public static ArrayList<AppInfo> getAllApp(Context context) {PackageManager manager = context.getPackageManager();Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);List<ResolveInfo> apps = manager.queryIntentActivities(mainIntent, 0);// 將擷取到的APP的資訊按名字進行排序Collections.sort(apps, new ResolveInfo.DisplayNameComparator(manager));ArrayList<AppInfo> appList = new ArrayList<AppInfo>();for (ResolveInfo info : apps) {AppInfo appInfo = new AppInfo();appInfo.setAppLable(info.loadLabel(manager) + "");appInfo.setAppIcon(info.loadIcon(manager));appInfo.setAppPackage(info.activityInfo.packageName);appInfo.setAppClass(info.activityInfo.name);appList.add(appInfo);System.out.println("info.activityInfo.packageName="+info.activityInfo.packageName);System.out.println("info.activityInfo.name="+info.activityInfo.name);}return appList;}/** * 擷取使用者安裝的APP應用 *  * @param context */public static ArrayList<AppInfo> getUserApp(Context context) {PackageManager manager = context.getPackageManager();Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);List<ResolveInfo> apps = manager.queryIntentActivities(mainIntent, 0);// 將擷取到的APP的資訊按名字進行排序Collections.sort(apps, new ResolveInfo.DisplayNameComparator(manager));ArrayList<AppInfo> appList = new ArrayList<AppInfo>();for (ResolveInfo info : apps) {AppInfo appInfo = new AppInfo();ApplicationInfo ainfo = info.activityInfo.applicationInfo;if ((ainfo.flags & ApplicationInfo.FLAG_SYSTEM) <= 0) {appInfo.setAppLable(info.loadLabel(manager) + "");appInfo.setAppIcon(info.loadIcon(manager));appInfo.setAppPackage(info.activityInfo.packageName);appInfo.setAppClass(info.activityInfo.name);appList.add(appInfo);}}return appList;}/** * 根據包名和Activity啟動類查詢應用資訊 *  * @param cls * @param pkg * @return */public static AppInfo getAppByClsPkg(Context context, String pkg, String cls) {AppInfo appInfo = new AppInfo();PackageManager pm = context.getPackageManager();Drawable icon;CharSequence label = "";ComponentName comp = new ComponentName(pkg, cls);try {ActivityInfo info = pm.getActivityInfo(comp, 0);icon = pm.getApplicationIcon(info.applicationInfo);label = pm.getApplicationLabel(pm.getApplicationInfo(pkg, 0));} catch (NameNotFoundException e) {icon = pm.getDefaultActivityIcon();}appInfo.setAppClass(cls);appInfo.setAppIcon(icon);appInfo.setAppLable(label + "");appInfo.setAppPackage(pkg);return appInfo;}/** * 跳轉到WIFI設定 *  * @param context */public static void intentWifiSetting(Context context) {if (android.os.Build.VERSION.SDK_INT > 10) {// 3.0以上開啟設定介面，也可以直接用ACTION_WIRELESS_SETTINGS開啟到wifi介面context.startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));} else {context.startActivity(new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS));}}/** * WIFI網路開關 *  */public static void toggleWiFi(Context context, boolean enabled) {WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);wm.setWifiEnabled(enabled);}/** * 移動網路開關 */public static void toggleMobileData(Context context, boolean enabled) {ConnectivityManager conMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);Class<?> conMgrClass = null; // ConnectivityManager類Field iConMgrField = null; // ConnectivityManager類中的欄位Object iConMgr = null; // IConnectivityManager類的引用Class<?> iConMgrClass = null; // IConnectivityManager類Method setMobileDataEnabledMethod = null; // setMobileDataEnabled方法try {// 取得ConnectivityManager類conMgrClass = Class.forName(conMgr.getClass().getName());// 取得ConnectivityManager類中的對象mServiceiConMgrField = conMgrClass.getDeclaredField("mService");// 設定mService可訪問iConMgrField.setAccessible(true);// 取得mService的執行個體化類IConnectivityManageriConMgr = iConMgrField.get(conMgr);// 取得IConnectivityManager類iConMgrClass = Class.forName(iConMgr.getClass().getName());// 取得IConnectivityManager類中的setMobileDataEnabled(boolean)方法setMobileDataEnabledMethod = iConMgrClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);// 設定setMobileDataEnabled方法可訪問setMobileDataEnabledMethod.setAccessible(true);// 調用setMobileDataEnabled方法setMobileDataEnabledMethod.invoke(iConMgr, enabled);} catch (ClassNotFoundException e) {e.printStackTrace();} catch (NoSuchFieldException e) {e.printStackTrace();} catch (SecurityException e) {e.printStackTrace();} catch (NoSuchMethodException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();}}/** * GPS開關 當前若關則開啟 當前若開則關閉 */public static void toggleGPS(Context context) {Intent gpsIntent = new Intent();gpsIntent.setClassName("com.android.settings","com.android.settings.widget.SettingsAppWidgetProvider");gpsIntent.addCategory("android.intent.category.ALTERNATIVE");gpsIntent.setData(Uri.parse("custom:3"));try {PendingIntent.getBroadcast(context, 0, gpsIntent, 0).send();} catch (CanceledException e) {e.printStackTrace();}}/** * 調節系統音量 *  * @param context */public static void holdSystemAudio(Context context) {AudioManager audiomanage = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);// 擷取系統最大音量// int maxVolume = audiomanage.getStreamMaxVolume(AudioManager.STREAM_MUSIC); // 擷取當前音量// int currentVolume = audiomanage.getStreamVolume(AudioManager.STREAM_RING); // 設定音量// audiomanage.setStreamVolume(AudioManager.STREAM_SYSTEM, currentVolume, AudioManager.FLAG_PLAY_SOUND);// 調節音量// ADJUST_RAISE 增大音量，與音量鍵功能相同 // ADJUST_LOWER 降低音量audiomanage.adjustStreamVolume(AudioManager.STREAM_SYSTEM,AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);}/** * 設定亮度（每30遞增） *  * @param resolver * @param brightness */public static void setBrightness(Activity activity) {ContentResolver resolver = activity.getContentResolver();Uri uri = android.provider.Settings.System.getUriFor("screen_brightness");int nowScreenBri = getScreenBrightness(activity);nowScreenBri = nowScreenBri <= 225 ? nowScreenBri + 30 : 30;System.out.println("nowScreenBri==" + nowScreenBri);android.provider.Settings.System.putInt(resolver, "screen_brightness",nowScreenBri);resolver.notifyChange(uri, null);}/** * 擷取螢幕的亮度 *  * @param activity * @return */public static int getScreenBrightness(Activity activity) {int nowBrightnessValue = 0;ContentResolver resolver = activity.getContentResolver();try {nowBrightnessValue = android.provider.Settings.System.getInt(resolver, Settings.System.SCREEN_BRIGHTNESS);} catch (Exception e) {e.printStackTrace();}return nowBrightnessValue;}/** * 跳轉到系統設定 *  * @param context */public static void intentSetting(Context context) {String pkg = "com.android.settings";String cls = "com.android.settings.Settings";ComponentName component = new ComponentName(pkg, cls);Intent intent = new Intent();intent.setComponent(component);context.startActivity(intent);}/** * 擷取檔案夾下所有檔案 * @param path * @return */public static ArrayList<File> getFilesArray(String path){File file = new File(path);File files[] = file.listFiles();ArrayList<File> listFile = new ArrayList<File>();if (files != null) {for (int i = 0; i < files.length; i++) {if (files[i].isFile()) {listFile.add(files[i]);}if (files[i].isDirectory()) {listFile.addAll(getFilesArray(files[i].toString()));}}}return listFile;}/**      * 擷取視頻的縮圖      * 先通過ThumbnailUtils來建立一個視頻的縮圖，然後再利用ThumbnailUtils來產生指定大小的縮圖。      * 如果想要的縮圖的寬和高都小於MICRO_KIND，則類型要使用MICRO_KIND作為kind的值，這樣會節省記憶體。      * @param videoPath 視頻的路徑      * @param width 指定輸出影片縮圖的寬度      * @param height 指定輸出影片縮圖的高度度      * @param kind 參照MediaStore.Images.Thumbnails類中的常量MINI_KIND和MICRO_KIND。      *            其中，MINI_KIND: 512 x 384，MICRO_KIND: 96 x 96      * @return 指定大小的影片縮圖      */  public static Bitmap getVideoThumbnail(String videoPath, int width, int height,              int kind) {          Bitmap bitmap = null;          // 擷取視頻的縮圖           bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);          //System.out.println("w"+bitmap.getWidth());          //System.out.println("h"+bitmap.getHeight());          bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height,                  ThumbnailUtils.OPTIONS_RECYCLE_INPUT);          return bitmap;      }/** * 開啟視頻檔案 * @param context * @param file 視頻檔案 */public static void intentVideo(Context context, File file){Intent intent = new Intent(Intent.ACTION_VIEW);String type = "video/*";Uri uri = Uri.fromFile(file);intent.setDataAndType(uri, type);context.startActivity(intent);}}

開機清除使用者資料

添加開機廣播

package com.topwise.airlinemanager;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.List;import android.app.ActivityManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.pm.IPackageDataObserver;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.util.Log;/** * 開機廣播 * @author XiaoSai * */public class CleanDataReceiverd extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {//清除使用者資料cleanUserData(context);}}class ClearUserDataObserver extends IPackageDataObserver.Stub {public void onRemoveCompleted(final String packageName,final boolean succeeded) {}}private void cleanUserData(Context context) {PackageManager manager = context.getPackageManager();List<PackageInfo> packages = manager.getInstalledPackages(0);ClearUserDataObserver mClearDataObserver = new ClearUserDataObserver();ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);Method targetMethod = null;Class<?> temp = am.getClass();// String className = temp.getName();Method[] methods = temp.getMethods();for (int j = 0; j < methods.length; j++) {if (("clearApplicationUserData".equals(methods[j].getName()))) {targetMethod = methods[j];break;}}String pkg = null;if (packages != null && packages.size() > 0) {for (int i = 0; i < packages.size(); i++) {pkg = packages.get(i).packageName;if (pkg.equals("com.sina.weibotab")|| pkg.equals("com.tencent.android.pad")|| pkg.equals("com.tencent.hd.qq")|| pkg.equals("com.tencent.WBlog")|| pkg.equals("com.tencent.mm")) {try {targetMethod.invoke(am, pkg, mClearDataObserver);Log.i("XIAOS", "clean pgk "+pkg);} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();}}}}}}

清除使用者資料需要調用ActivityManager類中的clearApplicationUserData方法，但是這個方法被系統給隱藏類，調用不了，不過我們可以通過反射機制來調用

AndroidManifest.xml 

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.player.playlauncher"    android:versionCode="1"    android:versionName="1.0"     android:sharedUserId="android.uid.system">    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="17" />    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>    <uses-permission android:name="android.permission.CLEAR_APP_USER_DATA"/>        <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity             android:name="com.player.playlauncher.FirstLevel"            android:label="@string/app_name"            android:icon="@drawable/ic_launcher">            <intent-filter >                <action android:name="android.intent.action.MAIN"/>                <category android:name="android.intent.category.LAUNCHER"/>            </intent-filter>        </activity>                <receiver             android:name=".CleanDataReceiverd">            <intent-filter>                <action android:name="android.intent.action.BOOT_COMPLETED" />            </intent-filter>        </receiver>    </application></manifest>

儲存可能會報錯，clean 一下項目就可以了

最後還需要在 Android.mk 中添加 一行

LOCAL_CERTIFICATE := platform

成功源於不斷的學習和積累 !