インストールされたアプリが最後にプログラムで使用されたことをどのように知ることができますか？

Question

アプリがAndroidで最後に使用された時期を知る方法を教えてください。これを判断することは可能ですか？最後に使用した日付を取得する方法は？

Answer 1

使用は、使用できるUsageStats

if(mUsageStats.getPackageName().equals("YOUR PACKAGE NAME")){ 
    mUsageStats.getLastTimeUsed(); 
} 

https://developer.android.com/reference/android/app/usage/UsageStats.html?hl=es#getLastTimeUsed()

Answer 2

UsageStatsManager

を使用してアプリのusuageを取得Manifest.Java

<uses-permission 
    android:name="android.permission.PACKAGE_USAGE_STATS" 
    tools:ignore="ProtectedPermissions" /> 
<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" > 
    <activity 
     android:name=".MainActivity" 
     android:label="@string/app_name" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

MainActivity.Java

import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.provider.Settings; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 
public class MainActivity extends Activity { 
    Button statsBtn; 
    TextView status; 
    Context mContext; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     status = (TextView) findViewById(R.id.status); 
     mContext = MainActivity.this; 
     //Check if permission enabled 
     if (UStats.getUsageStatsList(this).isEmpty()) { 
      Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS); 
      startActivity(intent); 
     } 
     statsBtn = (Button) findViewById(R.id.stats_btn); 
     statsBtn.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // UStats.printCurrentUsageStatus(MainActivity.this); 
       status.setText(UStats.printUsageStatus(mContext)); 
      } 
     }); 
    } 

} 

Ustats.Java

/** * 3/2/15上のユーザーによって作成されました。 */

public class UStats { 
    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("M-d-yyyy HH:mm:ss"); 
    public static final String TAG = UStats.class.getSimpleName(); 
    @SuppressWarnings("ResourceType") 
    public static void getStats(Context context) { 
     UsageStatsManager usm = (UsageStatsManager) context.getSystemService("usagestats"); 
     int interval = UsageStatsManager.INTERVAL_YEARLY; 
     Calendar calendar = Calendar.getInstance(); 
     long endTime = calendar.getTimeInMillis(); 
     calendar.add(Calendar.YEAR, -1); 
     long startTime = calendar.getTimeInMillis(); 
     Log.d(TAG, "Range start:" + dateFormat.format(startTime)); 
     Log.d(TAG, "Range end:" + dateFormat.format(endTime)); 
     UsageEvents uEvents = usm.queryEvents(startTime, endTime); 
     while (uEvents.hasNextEvent()) { 
      UsageEvents.Event e = new UsageEvents.Event(); 
      uEvents.getNextEvent(e); 
      if (e != null) { 
       Log.d(TAG, "Event: " + e.getPackageName() + "\t" + e.getTimeStamp()); 
      } 
     } 
    } 
    public static List<UsageStats> getUsageStatsList(Context context) { 
     UsageStatsManager usm = getUsageStatsManager(context); 
     Calendar calendar = Calendar.getInstance(); 
     long endTime = calendar.getTimeInMillis(); 
     calendar.add(Calendar.YEAR, -1); 
     long startTime = calendar.getTimeInMillis(); 
     Log.d(TAG, "Range start:" + dateFormat.format(startTime)); 
     Log.d(TAG, "Range end:" + dateFormat.format(endTime)); 
     List<UsageStats> usageStatsList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, startTime, endTime); 
     return usageStatsList; 
    } 
    public void printUsageStats(List<UsageStats> usageStatsList) { 
     String value = null; 
     for (UsageStats u : usageStatsList) { 
      Log.d(TAG, "Pkg: " + u.getPackageName() + "\t" + "ForegroundTime: " 
        + u.getTotalTimeInForeground()); 
      value = "Pkg: " + u.getPackageName() + "\t" + "ForegroundTime: " + u.getTotalTimeInForeground(); 
     } 
    } 
    public void printCurrentUsageStatus(Context context) { 
     printUsageStats(getUsageStatsList(context)); 
    } 
    public static String printUsageStatus(Context context) { 
     return printUsageStatss(getUsageStatsList(context)); 
    } 
    @SuppressWarnings("ResourceType") 
    private static UsageStatsManager getUsageStatsManager(Context context) { 
     UsageStatsManager usm = (UsageStatsManager) context.getSystemService("usagestats"); 
     return usm; 
    } 
    public static String printUsageStatss(List<UsageStats> usageStatsList) { 
     String value = null; 
     for (UsageStats u : usageStatsList) { 
      Log.d(TAG, "Pkg: " + u.getPackageName() + "\t" + "ForegroundTime: " 
        + u.getTotalTimeInForeground()); 
      value = "Pkg: " + u.getPackageName() + "\t" + "ForegroundTime: " + u.getTotalTimeInForeground(); 
     } 
     return value; 
    } 
}