listview项目的颜色非常微弱

时间:2013-12-24 11:53:00

标签: android android-listview

很抱歉,如果我重复这个问题。

我正在从收件箱中阅读短信并在列表视图中显示它们。

我可以在执行后看到listview中的SMS / s作为listview项目。

唯一的问题是,listview项目的文本颜色变得苍白。(我得到的文字不可读/可见)。

我试图改变它,但什么也没发生。

如何将此颜色更改为黑色或任何其他颜色?

这是我的 activity_view_task.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<TextView
    android:id="@+id/tv_tasks"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:text="Tasks"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<ListView
    android:id="@+id/lv_view_task"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/tv_tasks"
    android:layout_centerHorizontal="true"
    android:cacheColorHint="#000000"
    android:textColor="#000000">

</ListView>
</RelativeLayout>

这是我将java项目添加到listview的java文件:

package com.example.myapp;

import java.util.ArrayList;
import java.util.List;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.database.Cursor;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class ViewTask extends Activity {

TextView tv_view_task;
ListView lv_view_task;
static String sms = "";
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_view_task);
    tv_view_task=(TextView) findViewById(R.id.tv_view_task);
    lv_view_task=(ListView) findViewById(R.id.lv_view_task);

    List<String> msgList = getSms();

    final ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(),android.R.layout.select_dialog_singlechoice, msgList); 
      lv_view_task.setAdapter(adapter); 
}


public List<String> getSms() {
    List<String> labeles = new ArrayList<String>();
    Uri uri = Uri.parse("content://sms/inbox");
    Cursor c = getContentResolver().query(uri, null, null, null, null);


    // Read the sms data and store it in the list
    if (c.moveToFirst()) {
        do {
            String body = c.getString(c.getColumnIndex("body"));
            String address = c.getString(c.getColumnIndex("address"));
            sms = "From : " + address + " : " + body;
            labeles.add(sms);
        } while (c.moveToNext());
    }
    c.close();

    return labeles;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_view_task, menu);
    return true;
}

}

执行后看起来像这样:

enter image description here

3 个答案:

答案 0 :(得分:2)

您需要为您设置所需文本颜色的ListView项目创建自定义布局

通过这种方式,您甚至不需要自定义适配器

e.g。 custom_textview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:gravity="center"
android:layout_height="wrap_content"
>
<TextView 
android:id="@+id/tv"
android:textColor="@color/white"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_height="fill_parent"/>
</LinearLayout>

然后,您可以将布局与 ArrayAdapter

一起使用
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.custom_textview, aa);
lv.setAdapter(adapter);

答案 1 :(得分:1)

制作自定义布局名称 row_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  tools:ignore="HardcodedText,UselessParent" >

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center|left"
        android:layout_marginLeft="10dp"
        android:text="Medium Text"
        android:textColor="#000000"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textSize="16sp" />
  </LinearLayout>
</LinearLayout>

全局制作自定义适配器,如:

MyAdapter adp;

现在在onCreate()方法上初始化它:

adp = new MyAdapter (YourActivity.this, yourArrayList);


class MyAdapter extends BaseAdapter {

    Context c;
    String[] yourarraylist;
    LayoutInflater mInflater;

    public CustomAdapter(Context fullImage, String[] yourarraylist) {
        // TODO Auto-generated constructor stub
        this.c = fullImage;
        this.yourarraylist= yourarraylist;
        mInflater = LayoutInflater.from(c);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return yourarraylist.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.row_item, parent,
                    false);

            TextView tv = (TextView) convertView.findViewById(R.id.tv);
            // set text here
        }
        return convertView;
    }

}

答案 2 :(得分:0)

将此添加到您的activity_view_task.xml:

android:textColor="#000000"