UsageStatsManager是在5.0之后google提供给我们的一个新的API。需要询问是否用户允许了该权限。
- 首先添加manifest权限
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS"
tools:ignore="ProtectedPermissions" />- 判断是否开启了权限
@SuppressLint("NewApi")
public static boolean hasEnable(Context context){
if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){ // 如果大于等于5.0 再做判断
long ts = System.currentTimeMillis();
UsageStatsManager usageStatsManager=(UsageStatsManager)context.getSystemService(Service.USAGE_STATS_SERVICE);
List<UsageStats> queryUsageStats = usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_BEST, 0, ts);
if (queryUsageStats == null || queryUsageStats.isEmpty()) {
return false;
}
}
return true;
}或
if (!isAccessGranted()) {
Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);
}
private boolean isAccessGranted() {
try {
PackageManager packageManager = getPackageManager();
android.content.pm.ApplicationInfo applicationInfo = packageManager.getApplicationInfo(getPackageName(), 0);
AppOpsManager appOpsManager = (AppOpsManager) getSystemService(Context.APP_OPS_SERVICE);
int mode = 0;
if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.KITKAT) {
mode = appOpsManager.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS,
applicationInfo.uid, applicationInfo.packageName);
}
return (mode == AppOpsManager.MODE_ALLOWED);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
主程式：
private String printForegroundTask() {
String currentApp = "NULL";
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
UsageStatsManager usm = (UsageStatsManager)this.getSystemService("usagestats");
long time = System.currentTimeMillis();
List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time - 1000*1000, time);
if (appList != null && appList.size() > 0) {
SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>();
for (UsageStats usageStats : appList) {
mySortedMap.put(usageStats.getLastTimeUsed(), usageStats);
}
if (mySortedMap != null && !mySortedMap.isEmpty()) {
currentApp = mySortedMap.get(mySortedMap.lastKey()).getPackageName();
}
}
} else {
ActivityManager am = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> tasks = am.getRunningAppProcesses();
currentApp = tasks.get(0).processName;
}
Log.e("adapter", "Current App in foreground is: " + currentApp);
return currentApp;
}