无法使用ListView

我正在尝试使用ListView时发生错误。无法使用ListView

仔细看下android设备。错误。

它也说“无法找到风格‘listViewStyle’在当前主题”

我还没有添加适配器到此列表视图。如果这是问题，那么告诉我。

这项活动

package com.justforyou.bestnarutosongs; 

import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.WindowManager; 

public class SongsListActivity extends AppCompatActivity { 

private MediaPlayer mediaplayer; 
private AudioManager mAudioManager; 
private AudioManager.OnAudioFocusChangeListener mOnAudioFocusChangeListener = new AudioManager.OnAudioFocusChangeListener() 
{ 
    @Override 
    public void onAudioFocusChange(int focusChange){ 
     if(focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK || focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT){ 
      mediaplayer.pause(); 
      mediaplayer.seekTo(0); 
     } 
     else if(focusChange == AudioManager.AUDIOFOCUS_GAIN){ 
      mediaplayer.start(); 
     } 
     else if(focusChange == AudioManager.AUDIOFOCUS_LOSS){ 
      if(mediaplayer != null) 
      { 
       mediaplayer.release(); 
       mediaplayer = null; 
      } 
     } 
    } 
}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_songs_list); 
} 
}

这里我java代码是我style.xml

<!-- Copyright (C) 2016 The Android Open Source Project 

Licensed under the Apache License, Version 2.0 (the "License"); 
you may not use this file except in compliance with the License. 
You may obtain a copy of the License at 

     http://www.apache.org/licenses/LICENSE-2.0 

Unless required by applicable law or agreed to in writing, software 
distributed under the License is distributed on an "AS IS" BASIS, 
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
See the License for the specific language governing permissions and 
limitations under the License. 
-->

<!-- Base application theme. --> 
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> 
    <item name="colorPrimary">@color/primary_color</item> 
    <item name="colorPrimaryDark">@color/primary_dark_color</item> 
</style> 

<!-- Style for a category of vocabulary words --> 
<style name="CategoryStyle"> 
    <item name="android:layout_width">match_parent</item> 
    <item name="android:layout_height">@dimen/list_item_height</item> 
    <item name="android:gravity">center_vertical</item> 
    <item name="android:padding">16dp</item> 
    <item name="android:textColor">@android:color/white</item> 
    <item name="android:textStyle">bold</item> 
    <item name="android:textAppearance">?android:textAppearanceMedium</item> 
</style>

来源

2016-08-01 HARSHIL JAIN

你有没有试图改变下拉菜单，从24到23？ –

变化从右上角的API级别，目前它是24.更改后运行应用程序。我希望它会起作用。

来源

2016-08-01 13:29:09 UserAndroid

不，我不会。我已经尝试过了。 –

你应该把你的ListView在特定的布局类似的RelativeLayout，LinearLayout中，等...

像这个例子：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:padding="6dip" > 

    <ListView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/listview" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" /> 

</RelativeLayout>

来源

2016-08-01 14:17:17 alway5dotcom

无法使用ListView

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