Android:mp3无法播放

时间:2014-06-18 21:49:48

标签: android mp3 android-mediaplayer

尝试播放我的mp3时没有声音。我是否需要在清单中启用某些内容? 我找到了一些刚创建了媒体播放器的例子,并称之为start。

我只能在停止呼叫后调用准备。

每次按下播放按钮时,日志显示2条开始消息和2条停止消息。为什么2?

代码:

package com.xx.yy;

import java.io.IOException;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainMenuFragment extends Fragment implements OnClickListener
{
    private MediaPlayer mediaPlayer;
    private boolean pressed = false;
    private boolean stopped = false;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    {               
        View view = inflater.inflate( R.layout.main_menu_layout, container, false );

        view.setBackgroundResource( 0 );

        Button play = (Button) view.findViewById( R.id.play_button );
        play.setOnClickListener( this );

        mediaPlayer = MediaPlayer.create( getActivity(), R.raw.qa2pir_projektrespekt );

        return view;
    }

    @Override
    public void onClick( View view ) 
    {
        if ( !pressed )
        {
            try 
            {
                if ( stopped )
                {
                    mediaPlayer.prepare();
                }
                mediaPlayer.start();
                pressed = true;
            } 
            catch ( IllegalStateException e ) 
            {
                Log.d( "IllegalState", e.toString() );
            } 
            catch ( IOException e ) 
            {
                Log.d( "IO", e.toString() );
            }
        }
        else
        {
            mediaPlayer.stop();
            pressed = false;
            stopped = true;
        }
    }

}

布局:

<LinearLayout 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:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/play_button"
        android:background="@color/black"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="75dp" 
        android:layout_marginBottom="0dp" 
        android:textColor="@color/white"
        android:textSize="25sp"
        android:textStyle="bold"
        android:text="@string/play"
        android:paddingLeft="5dp"
        android:paddingRight="5dp"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
    />

</LinearLayout>

清单:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.xx.yy"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">

        <activity android:label="@string/app_name" android:name="com.sj.replicator.MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

    </application>

</manifest>

1 个答案:

答案 0 :(得分:0)

 MediaPlayer mPlayer= MediaPlayer.create(getActivity().getApplicationContext(), com.cea_new.R.raw.c2hindi);;
    mPlayer.start();

试试这个代码。“com.cea_new”是我的包名,所以用你的包名替换它。

这里R.raw.filename不起作用,因为它是活动中的一个片段,只有R.raw.filename可以工作