java - 在不退出当前 Activity 的情况下设置启动器

当我的主屏幕从默认设置清除后，我可以发出此意图以触发“启动选择器对话框”，在此处可以选择默认的启动器。

        Intent i = new Intent(Intent.ACTION_MAIN);
        i.addCategory(Intent.CATEGORY_HOME);
        i.addCategory(Intent.CATEGORY_DEFAULT);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivityForResult(i, 1);

问题是，当用户选择了启动器后，我的当前活动将恢复，而新的启动器将出现在前台。

我尝试通过以下方式启动选择器的意图：

startActivity(Intent.createChooser(i, "Choose one"));

但这是行不通的。

在设置新启动器时，是否可以保持当前活动可见？

最佳答案

好的，Nova Launcher使用此功能（我认为）。这是他们的HomeReset类。

public class HomeReset
  extends Activity
{
  public static ComponentName D(PackageManager paramPackageManager)
  {
    ComponentName localComponentName = null;
    try
    {
      Intent localIntent = new Intent("android.intent.action.MAIN", null);
      localIntent.addCategory("android.intent.category.HOME");
      localIntent.addFlags(270532608);
      localComponentName = localIntent.resolveActivity(paramPackageManager);
      if (("android".equals(localComponentName.getPackageName())) && ("com.android.internal.app.ResolverActivity".equals(localComponentName.getClassName()))) {
        return null;
      }
      return localComponentName;
    }
    catch (Exception localException)
    {
      Log.e("HomeReseter", "Exception when trying to find default home", localException);
    }
    return localComponentName;
  }

  public static Intent D()
  {
    Intent localIntent = new Intent("android.intent.action.MAIN", null);
    localIntent.addCategory("android.intent.category.HOME");
    localIntent.addFlags(270532608);
    return localIntent;
  }

  public static void D(Activity paramActivity)
  {
    PackageManager localPackageManager = paramActivity.getPackageManager();
    localPackageManager.setComponentEnabledSetting(new ComponentName(paramActivity.getPackageName(), "com.teslacoilsw.launcher.homereset.HomeReset"), 1, 1);
    Intent localIntent = new Intent("android.intent.action.MAIN", null);
    localIntent.addCategory("android.intent.category.HOME");
    localIntent.addFlags(270532608);
    localIntent.addFlags(268435456);
    localIntent.putExtra("homereset_return_to_settings", true);
    paramActivity.startActivity(localIntent);
    localPackageManager.setComponentEnabledSetting(new ComponentName(paramActivity.getPackageName(), "com.teslacoilsw.launcher.homereset.HomeReset"), 2, 1);
    paramActivity.startActivity(localIntent);
  }

  public void onCreate(Bundle paramBundle)
  {
    super.onCreate(paramBundle);
    Context localContext = getApplicationContext();
    PackageManager localPackageManager = getPackageManager();
    localPackageManager.setComponentEnabledSetting(new ComponentName(localContext.getPackageName(), "com.teslacoilsw.launcher.homereset.HomeReset"), 1, 1);
    Intent localIntent1 = new Intent("android.intent.action.MAIN", null);
    localIntent1.addCategory("android.intent.category.HOME");
    localIntent1.addFlags(270532608);
    localIntent1.setFlags(268435456);
    localContext.startActivity(localIntent1);
    localPackageManager.setComponentEnabledSetting(new ComponentName(localContext.getPackageName(), "com.teslacoilsw.launcher.homereset.HomeReset"), 2, 1);
    Intent localIntent2 = new Intent("android.intent.action.MAIN", null);
    localIntent2.addCategory("android.intent.category.HOME");
    localIntent2.addFlags(270532608);
    localIntent2.setFlags(402653184);
    localContext.startActivity(localIntent2);
  }
}

有帮助吗？我找不到它的R.Java文件，因为它被混淆了，所以我不能告诉您ID引用。

编辑：我认为这是启动上述活动的方式。这来自他们的SettingsActivity：

...
      Preference localPreference = findPreference("select_home");
      if (localPreference == null) {
        return;
      }
      Object localObject = null;
      PackageManager localPackageManager = getActivity().getPackageManager();
      ComponentName localComponentName = HomeReset.D(localPackageManager);
      if (localComponentName != null) {}
      try
      {
        localObject = localPackageManager.getActivityInfo(localComponentName, 0).loadLabel(localPackageManager);
      }
      catch
...