Question

我正在尝试在我的应用程序中实现一个侧面菜单它在大多数情况下工作正常，但我遇到的问题是，一旦我显示菜单并尝试向下滚动整个列表变成白色（背景）和文本消失。

http://i.imgur.com/6a6TgJJ.png

http://i.imgur.com/ykT7hCN.png

上面我附上两张显示菜单行为的图片，当我从左侧向右侧滑动手指时，侧边菜单显示，但是如果我在菜单中向下滚动，它会变成一个空的白名单，这是我的代码：

public class ControlApp extends SlidingActivity{

ArrayList<String> datos ;
ArrayAdapter<String> adaptador;
Intent intent;
private String[] mMenuLista;
//  private MyCustomAdapter mAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_notificaciones);
    setBehindContentView(R.layout.activity_menu);

    Parse.initialize(this, "BqCCNsbb14MPgeWz3rznxO4DamuXUbsgiTug8P8I", "9j7GSLWnV46fkPsNMwnMD2FormAiclKlGitfDq2b"); 
    ParseAnalytics.trackAppOpened(getIntent());

    getSlidingMenu().setBehindOffset(100);

//      mAdapter = new MyCustomAdapter();



    PushService.setDefaultPushCallback(this, Notificaciones.class);
    ParseInstallation.getCurrentInstallation().saveInBackground();

    mMenuLista =  getResources().getStringArray(R.array.lista_menu);
//      for(int i=0; i<=9;i++){
//          mAdapter.addItem(mMenuLista[i]);
//          if(i == 9){
//              mAdapter.addSeparatorItem(mMenuLista[i]);
//          }
//      }



    ListView primario = (ListView) findViewById(R.id.left_drawer);
    primario.setAdapter(new ArrayAdapter<String>(this,R.layout.drawer_list, mMenuLista));



    primario.setOnItemClickListener(new OnItemClickListener() { 
        @Override
        public void onItemClick(AdapterView<?> pariente, View view, int posicion, long id) {

            selectItem(posicion);

        }
    });





}

public void selectItem(int posicion){
    switch (posicion) {
    case 0:
        intent = new Intent(ControlApp.this, Notificaciones.class);
        startActivity(intent);
        break;
    case 1:
        intent = new Intent(ControlApp.this, Calificaiones.class);
        startActivity(intent);
        break;
    case 2:
        intent = new Intent(ControlApp.this, Mensajes.class);
        startActivity(intent);
        break;
    case 3:
        intent = new Intent(ControlApp.this, Citas.class);
        startActivity(intent);
        break;
    case 4:
        intent = new Intent(ControlApp.this, Permisos.class);
        startActivity(intent);
        break;
    case 5:
        intent = new Intent(ControlApp.this, Eventos.class);
        startActivity(intent);
        break;
    case 6:
        intent = new Intent(ControlApp.this, Horarios.class);
        startActivity(intent);
        break;
    case 7:
        intent = new Intent(ControlApp.this, Circulares.class);
        startActivity(intent);
        break;
    case 8:
        intent = new Intent(ControlApp.this, ProgramaDeEstudios.class);
        startActivity(intent);
        break;
    case 9:
        intent = new Intent(ControlApp.this, Ajustes.class);
        startActivity(intent);
        break;
    case 10:

        ParseUser.logOut();
        ParseUser currentUser = ParseUser.getCurrentUser();
        if (currentUser == null){
            // sesion cerrada correctamente
            Toast toast = Toast.makeText(getApplicationContext(), "Sesión cerrada correctamente", Toast.LENGTH_SHORT);
            toast.show();
            Intent regis = new Intent (ControlApp.this, MainActivity.class);
            startActivity(regis);
            finish();
        }else{
            Toast toast = Toast.makeText(getApplicationContext(), "No se logro cerrar sesion, intentelo de nuevo", Toast.LENGTH_SHORT);
            toast.show();

        }
        break;

    default:
        break;
    }

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}



}

我希望有人能帮我找到错误，以便纠正错误。谢谢!!!

Answer 1

我猜你是手动将菜单中ListView的背景颜色设置为黑色，而主要活动主题是白色背景？

您需要在android:cacheColorHint上设置ListView属性以匹配列表背景颜色。由于Android的渲染优化而出现白色，它使用cacheColorHint值在滚动时快速重绘列表。

我读了一篇好文章，详细介绍了这个问题。我现在找不到它，但是如果我这样做会链接到它：）

向下滚动时，侧面菜单变为白色

1 个答案: