我需要使用ListView创建一个Activity，它可以有超过50个ImageButton，每个ImageButtons播放不同的声音。
这是主要的活动（可以有按钮）：
<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"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.werewolve.freaksound.sounds"
android:background="@drawable/f_background_fit">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:src="@drawable/f_logo" />
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/soundList"
android:layout_below="@+id/imageView"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp" />
</RelativeLayout>
这是我对listview的每一行的自定义布局：
<?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/list_item_string"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:textSize="18sp"
android:textStyle="bold" />
<ImageButton
android:id="@+id/play_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#00000000"
android:src="@drawable/f_button_s"
android:layout_centerVertical="true"
android:layout_marginRight="5dp" />
</RelativeLayout>
每个按钮将与onClick＆＃34; play_btn＆＃34;播放不同的声音。和一个根据声音的文字，字符串＆＃34; list_item_string＆＃34;。
示例：
*（笑声）* （播放按钮）***
答案 0 :(得分：2)
你应该像这样创建一个自定义适配器：
public class PlaySoundsAdapter extends BaseAdapter implements View.OnClickListener {
SoundExample[] sounds;
Activity context;
PlaySoundAlert soundPlayerAlert;
public PlaySoundsAdapter(Activity context, SoundExample[] soundsArray) {
this.context = context;
this.sounds = soundsArray;
// Hooks up the PlaySoundAlert.PlaySound in MainActivity
this.soundPlayerAlert = (PlaySoundAlert)context;
}
@Override
public int getCount() {
return sounds == null ? 0 : sounds.length;
}
@Override
public Object getItem(int i) {
return sounds[i];
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
SoundExample item = (SoundExample)getItem(i);
if (view == null) // reuse existing view
view = context.getLayoutInflater().inflate(R.layout.custom_sound_layout,
viewGroup, false);
// Set the TextView to the name of the sound
TextView t = (TextView)view.findViewById(R.id.txtName);
t.setText(item.getSoundName());
// Set the tag of the button to the sound resource id (uri)
Button b = (Button)view.findViewById(R.id.play_btn);
b.setTag(item.getSoundUri());
// When the button is clicked, play the associated sound
b.setOnClickListener(this);
return view;
}
@Override
public void onClick(View view) {
Button b = (Button) view;
if (b != null) {
int soundUri = (int)b.getTag();
// Notify listener (MainActivity) to play the required sound
if (soundPlayerAlert != null) {
soundPlayerAlert.playSound(soundUri);
}
}
}
}
接下来，创建一个可在活动中实现的界面，播放如下声音：
public interface PlaySoundAlert {
public void playSound(int uri);
}
正如您所看到的，我在上面创建的Adapter使用此界面来触发事件以播放所需的声音。
您的SoundExample课可能会喜欢这样的内容：
public class SoundExample {
private int soundUri;
private String soundName;
public String getSoundName() {
return soundName;
}
public void setSoundName(String soundName) {
this.soundName = soundName;
}
public int getSoundUri() {
return soundUri;
}
public void setSoundUri(int soundUri) {
this.soundUri = soundUri;
}
}
要在Activity或Fragment中使用此功能，请使用以下内容：
public class MainActivity extends Activity implements PlaySoundAlert {
ListView lstSounds;
PlaySoundsAdapter soundsAdapter;
SoundExample[] mySounds;
// Media player for playing sounds
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstSounds = (ListView) findViewById(R.id.soundList);
// Create sound list & add two SoundExample objects
mySounds = new SoundExample[2];
SoundExample s1 = new SoundExample();
SoundExample s2 = new SoundExample();
// Set sound one to a beep
s1.setSoundName("Beep Sound");
s1.setSoundUri(R.raw.beep);
// Set sound two to an applause sound
s2.setSoundName("Applause Sound");
// NOTE: I am using a sound titled applause.mp3 inside a folder called "raw"
s2.setSoundUri(R.raw.applause);
// Add sounds to the list
mySounds[0] = s1;
mySounds[1] = s2;
// Instantiate the adapter and apply to the ListView
soundsAdapter = new PlaySoundsAdapter(this, mySounds);
lstSounds.setAdapter(soundsAdapter);
}
@Override
public void playSound(int uri) {
// Play sound
mp = MediaPlayer.create(this, uri);
if (!mp.isPlaying())
mp.start();
}
}
这应该就是你所需要的！
答案 1 :(得分：0)
解决方案是创建一个自定义ListView对象，其中TextView用于显示按钮的名称和ImageButton。然后，您可以使用自定义ListView将这些对象添加到Adapter。 ImageButton的替代方法是简单地使用常规图像并将其设为Clickable。可以在此处找到创建可显示自定义对象的ListView的一个很好的示例（包括如何创建自定义Adapter）：http://www.androidinterview.com/android-custom-listview-with-image-and-text-using-arrayadapter/