Android:ListView文字颜色不可见，我不希望它不可见 [英] Android: ListView text color is invisible and I don't want it invisible
问题描述
我的Layout上有两个ListView和一个EditText.我必须先显示一个，然后单击他的一个选项后，我必须显示另一个ListView.
I have two ListView and an EditText on my Layout. I have to show one first, and after clicked one of his options I have to show the other ListView.
一切正常，但是当我必须显示第二个ListView时出现问题，我看不到选项的文本，我只能在按下选项时看到文本，按下后，我可以看到白色的文本(与背景颜色相同).
All works fine, but the problem appears when I have to show the second ListView, I can't see the text of the options, I only can see the text when I press the option and it is pressed I can see the text in white (the same color of the background).
我不明白为什么会这样，因为我已经定义了ListView，就像第二个一样，但是其中一个以黑色显示文本，第二个以白色显示.除了它们的位置，我没有更改任何ListView属性.我把代码和xml文件放在可以帮助的地方，谢谢！
I don't understand why this happens, because I have the ListView one defined like the second, but one of them show the text in black and the second in white. I don't change any ListView property except the location of them. I put the code and the xml files if it could help, thanks!
这是我课程的一部分，所有与ListView s相关:
Here is a part of my class, all related to the ListViews:
public class activitySelectEnvironment extends Activity{
ListView lvEnvironment;
ListView lvPlanes;
@SuppressLint("InlinedApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER_LANDSCAPE);
setContentView(R.layout.activity_select_environment);
myIntent = new Intent();
lvEnvironment = (ListView)findViewById(R.id.listViewEnvironment);
lvPlanes = (ListView)findViewById(R.id.listViewPlane);
//lvPlanes.setVisibility(View.GONE);
lvEnvironment.setVisibility(View.VISIBLE);
}
@Override
public void onResume()
{
super.onResume();
registerReceiver(receptorBroadcast, filtroIntents);
if (!verificaConexion(getApplicationContext()))
{
Toast.makeText(getApplicationContext(), "No hay conexión a Internet.", Toast.LENGTH_SHORT).show();
}
else
{
RequestEdificios re = new RequestEdificios(this, IP, user, password);
re.execute("");
}
}
@Override
public void onPause()
{
super.onPause();
this.unregisterReceiver(receptorBroadcast);
}
@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;
}
/*******************************************************/
/******** Receptor de broadcast ********/
/*******************************************************/
public class ReceptorBroadcast extends BroadcastReceiver
{
@Override
public void onReceive(Context arg0, Intent intent)
{
if(RequestEdificios.ACTION_SINCRONIZACION_FINALIZADA.equals(intent.getAction()))
{
buildingId = intent.getStringArrayListExtra("id_edificio");
buildingArray = intent.getStringArrayListExtra("buildingArray");
RefrescaPantalla(intent.getStringArrayExtra("edificios"));
}
if(RequestPlanes.ACTION_SINCRONIZACION_PLANES_FINALIZADA.equals(intent.getAction()))
{
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_expandable_list_item_1, android.R.id.text1, intent.getStringArrayExtra("planos"));
lvEnvironment.setVisibility(View.GONE);
//lvPlanes.setVisibility(View.VISIBLE);
//Assign adapter to ListView
lvPlanes.setAdapter(adapter);
//ListView Item Click Listener
lvPlanes.setOnItemClickListener(new OnItemClickListener()
{
/* code */
}
});
}
if(InsertPaths.ACTION_SINCRONIZACION_INSERT_FINALIZADA.equals(intent.getAction()))
{
Toast.makeText(getApplicationContext(), "Plano subido a la base de datos." , Toast.LENGTH_LONG).show();
myIntent.setClass(activitySelectEnvironment.this, activitySelectFoot.class);
startActivity(myIntent);
}
}
}
private void RefrescaPantalla(String[] result)
{
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, android.R.id.text1, result);
//Assign adapter to ListView
lvEnvironment.setAdapter(adapter);
//ListView Item Click Listener
lvEnvironment.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
if (!verificaConexion(getApplicationContext()))
{
Toast.makeText(getApplicationContext(), "No hay conexión a Internet.", Toast.LENGTH_SHORT).show();
}
else
{
/* code */
}
}
});
}
public static boolean verificaConexion(Context ctx)
{
boolean bConectado = false;
ConnectivityManager connec = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
// No sólo wifi, también GPRS
NetworkInfo[] redes = connec.getAllNetworkInfo();
// este bucle debería no ser tan ñapa
for (int i = 0; i < 2; i++)
{
// ¿Tenemos conexión? ponemos a true
if (redes[i].getState() == NetworkInfo.State.CONNECTED)
{
bConectado = true;
}
}
return bConectado;
}
}
这是布局的XML文件:
Here is the XML file of the layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/txtHead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="78dp"
android:layout_marginTop="39dp"
android:background="@drawable/edittext_rounded_corners"
android:text="Primero indique a que planta pertenece y después seleccione el edificio:"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="25dp" />
<ListView
android:id="@+id/listViewEnvironment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtHead"
android:layout_below="@+id/txtHead"
android:layout_marginTop="30dp" >
</ListView>
<ListView
android:id="@+id/listViewPlane"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtHead"
android:layout_below="@+id/txtHead"
android:layout_marginTop="30dp" >
</ListView>
</RelativeLayout>
谢谢大家！
推荐答案
问题出在上下文上，我给的上下文不好，这改变了listview文本的textcolor，第二个listView的正确上下文是:getBaseContext ()，因此正确的适配器是:
The problem was on the context, I was giving a bad context and this change the textcolor of the listview text, the correct context of the second listView is: getBaseContext(), so the correct adapter was:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_expandable_list_item_1, android.R.id.text1, intent.getStringArrayExtra("planos"));
希望这对其他人有所帮助！ :)
Hope this help other people! :)
这篇关于Android:ListView文字颜色不可见，我不希望它不可见的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
