initial commit

app/src/main/java/com/stardust/scriptdroid/runningservices/RunningPackageTool.java

@@ -0,0 +1,78 @@
+package com.stardust.scriptdroid.runningservices;
+
+import android.annotation.TargetApi;
+import android.app.ActivityManager;
+import android.app.usage.UsageStats;
+import android.app.usage.UsageStatsManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.provider.Settings;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Created by Stardust on 2017/1/20.
+ */
+
+public class RunningPackageTool {
+
+
+    public static String getRunningPackage(Context context) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            return getRunningPackageLollipop(context);
+        } else {
+            return getRunningPackageBeforeLollipop(context);
+        }
+
+    }
+
+    private static String getRunningPackageBeforeLollipop(Context context) {
+        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        @SuppressWarnings("deprecation")
+        ComponentName runningActivity = am.getRunningTasks(1).get(0).topActivity;
+        return runningActivity.getPackageName();
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private static String getRunningPackageLollipop(Context context) {
+        List<UsageStats> usageStats = getPastTwoSecondsUsageStats(context);
+        UsageStats latestStats = findLatestUsageStats(usageStats);
+        if (latestStats == null)
+            return null;
+        return latestStats.getPackageName();
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private static void goToUsageAccessSettings(Context context) {
+        Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
+        context.startActivity(intent);
+    }
+
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private static UsageStats findLatestUsageStats(List<UsageStats> usageStats) {
+        UsageStats latestStats = null;
+        for (UsageStats us : usageStats) {
+            if (latestStats == null || latestStats.getLastTimeUsed() < us.getLastTimeUsed()) {
+                latestStats = us;
+            }
+        }
+        return latestStats;
+    }
+
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP_MR1)
+    @SuppressWarnings("unchecked")
+    private static List<UsageStats> getPastTwoSecondsUsageStats(Context context) {
+        long ts = System.currentTimeMillis();
+        UsageStatsManager usageStatsManager = (UsageStatsManager) context.getSystemService(Context.USAGE_STATS_SERVICE);
+        List<UsageStats> usageStats = usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_BEST, ts - 2000, ts);
+        if (usageStats == null) {
+            usageStats = Collections.EMPTY_LIST;
+        }
+        return usageStats;
+    }
+}