Question

老实说，我不知道为什么，但我已经在stackoverflow上遇到同样问题的任何解决方案都不适用于我当我为我的电台播放我的流时，我试图在点击时切换播放/暂停按钮。

我不知道我做错了什么。

目前它是独立的，因为我的许多尝试都失败了。

main.xml （很多人称之为活动主体）

<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>

MusicAndroidActivity.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;
            }
        }
    }

的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>

Answer 1

您应该用按钮替换两个按钮。我把它命名为bt_play_pause。然后，将两个图像添加到Resource文件夹，它们是pause.png和start.png，可能是。并查看我的代码。希望它可以帮到你。

main.xml中

<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>

MusicAndroidActivity.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;
        }
    }
}

Answer 2

将<Button...更改为<ImageButton ... 你的xml现在应该是这样的。

<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>

并通过执行此操作在您的Java代码中引用它

ImageButton imgBtn = (ImageButton)findViewById(R.id.play_or_pause)
...
imgBtn.setImageResource(R.drawable.pause);
                //when MediaPlayer stared, pause button is shown
                }
                else{
                if(mPlayer!=null && mPlayer.isPlaying()){
                    mPlayer.stop();
                    paused = true;
                    imgBtn.setImageResource(R.drawable.start);
                   //when MediaPlayer paused, startbutton is shown
                }

Android点击时更改播放/暂停按钮图标

2 个答案: