[英]Android change play/pause button icon when clicked
老實說,我不知道為什么,但是我已經在 stackoverflow 上遇到的相同問題的任何解決方案都不適合我我試圖在為我的廣播電台播放我的流時單擊時切換播放/暫停按鈕。
我不知道我做錯了什么。
目前它是獨立的,因為我的許多嘗試都失敗了。
main.xml (很多人稱之為活動主)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg"
android:weightSum="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/logo"
android:id="@+id/imageView4" />
<Button
android:id="@+id/play"
android:layout_margin="10dip"
android:background="@drawable/play"
android:layout_width="50dp"
android:layout_height="50dp" />
<Button
android:id="@+id/stop"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="10dip"
android:background="@drawable/pause" />
</LinearLayout>
音樂AndroidActivity.java
package clever.radio;
import java.io.IOException;
import android.app.Activity;
import android.graphics.BitmapFactory;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.Toast;
import static android.R.attr.id;
public class MusicAndroidActivity extends Activity {
static MediaPlayer mPlayer;
Button buttonPlay;
Button buttonStop;
String url = "http://radioclever.stream:8000/stream";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonPlay = (Button) findViewById(R.id.play);
buttonPlay.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mPlayer.setDataSource(url);
} catch (IllegalArgumentException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (SecurityException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IllegalStateException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
try {
mPlayer.prepare();
} catch (IllegalStateException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
}
mPlayer.start();
}
});
buttonStop = (Button) findViewById(R.id.stop);
buttonStop.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(mPlayer!=null && mPlayer.isPlaying()){
mPlayer.stop();
}
}
});
}
protected void onDestroy() {
super.onDestroy();
// TODO Auto-generated method stub
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="clever.radio"
android:versionCode="1"
android:versionName="1.1" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@style/AppTheme" >
<activity
android:name=".MusicAndroidActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
將<Button...
更改為<ImageButton
... 您的 xml 現在應該如下所示。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg"
android:weightSum="1">
<ImageButton
android:id="@+id/play_or_pause"
android:layout_margin="10dip"
android:background="@drawable/play"
android:layout_width="50dp"
android:layout_height="50dp" />
</LinearLayout>
並通過執行此操作在您的 Java 代碼中引用它
ImageButton imgBtn = (ImageButton)findViewById(R.id.play_or_pause)
...
if ( mPlayer != null && mPlayer.isPlaying() ) {
// When MediaPlayer paused, start button is shown
mPlayer.stop();
paused = true;
imgBtn.setImageResource(R.drawable.start);
} else {
// When MediaPlayer started, pause button is shown
imgBtn.setImageResource(R.drawable.pause);
}
您應該用一個按鈕替換兩個按鈕。 我將其命名為 bt_play_pause。 然后,在Resource文件夾中添加兩張圖片,分別是pause.png和start.png,可能是。 並查看我的代碼。 希望它可以幫助你。
主文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg"
android:weightSum="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/logo"
android:id="@+id/imageView4" />
<Button
android:id="@+id/bt_start_pause"
android:layout_margin="10dip"
android:background="@drawable/play"
android:layout_width="50dp"
android:layout_height="50dp" />
</LinearLayout>
音樂AndroidActivity.java
public class MusicAndroidActivity extends Activity {
static MediaPlayer mPlayer;
Button bt_start_pause;
boolean paused = true;
String url = "http://radioclever.stream:8000/stream";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bt_start_pause= (Button) findViewById(R.id.bt_start_pause);
bt_start_pause.setImageResource(R.drawable.start); bt_start_pause.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(paused){
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mPlayer.setDataSource(url);
} catch (IllegalArgumentException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (SecurityException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IllegalStateException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
try {
mPlayer.prepare();
} catch (IllegalStateException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
}
mPlayer.start();
paused = false;
bt_start_pause.setImageResource(R.drawable.pause);
//when MediaPlayer stared, pause button is shown
}
else{
if(mPlayer!=null && mPlayer.isPlaying()){
mPlayer.stop();
paused = true;
bt_start_pause.setImageResource(R.drawable.start);
//when MediaPlayer paused, startbutton is shown
}
}
}
});
}
protected void onDestroy() {
super.onDestroy();
// TODO Auto-generated method stub
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
}
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