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我正在开发一个直播流媒体收音机，并在操作栏图标中给出了控件，如播放和通过菜单项停止图标。所有这些项目都很完美。我想要的是，当我开始我的应用程序时，它会显示只播放图标项目，当我点击播放图标，流获取开始和停止图标将出现，而不是玩...当我按停止图标，然后播放图标出现。在播放音乐时，如媒体播放器中出现暂停按钮，并在出现按下暂停按钮时播放按钮。 我不能得到这方面的任何解决方案，我用我整天在这...请帮助我获得解决方案如何在点击时隐藏和显示菜单项图标？
这是XML代码
<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/play"
android:icon="@drawable/ic_play"
app:showAsAction="ifRoom|withText"
android:title="Play" />
<item
android:id="@+id/pause"
android:icon="@drawable/ic_pause"
app:showAsAction="always"
android:title="Pause" />
</menu>
这是我的主要活动代码
//STARTING GET MEDIA FUNCTION
private void getMedia() {
try {
mediaPlayer = new MediaPlayer();
url = new URL(address);
mediaPlayer.setDataSource(String.valueOf(url));
mediaPlayer.prepareAsync();
mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
return false;
}
});
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
bConnected = true;
if (bShouldPlay) {
mediaPlayer.start();
}
Toast.makeText(getBaseContext(), "Connected...", Toast.LENGTH_LONG).show();
}
});
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//ONCREATE FUNCTION START
@Override
protected void onCreate(Bundle savedInstanceState) {
bConnected = false;
bShouldPlay = false;
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
private Document Getdata() {
try {
url = new URL(address);
connection= (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
inputStream = connection.getInputStream();
builderFactory= DocumentBuilderFactory.newInstance();
builder= builderFactory.newDocumentBuilder();
xmlDoc = builder.parse(inputStream);
return xmlDoc;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
onCreateOptionsMenu(menu);
inflator.inflate(R.menu.menu, menu);
return false;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
bConnected = false;
bShouldPlay = false;
switch (item.getItemId()) {
case R.id.actionPlay:
if (bConnected) {
mediaPlayer.start();
Toast.makeText(getBaseContext(), "Playing...", Toast.LENGTH_LONG).show();
} else {
bShouldPlay = true;
getMedia();
Toast.makeText(getBaseContext(), "Still connecting...", Toast.LENGTH_LONG).show();
}
Toast.makeText(getBaseContext(), "Connected...", Toast.LENGTH_LONG).show();
break;
case R.id.actionStop:
if (mediaPlayer.isPlaying()) {
Toast.makeText(this, "Stopping Media Player....", Toast.LENGTH_LONG).show();
mediaPlayer.stop();
mediaPlayer.release();
bConnected = false;
bShouldPlay = false;
Toast.makeText(this, "Media Player is Stopped....", Toast.LENGTH_LONG).show();
}
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
请帮我解决这个..
使用findViewById（R.id.play）和findViewById（R.id.stop）获取按钮并将其可见性设置为GONE或VISIBLE –