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美好的一天先生/女士，所以我能够在onCreate上播放音乐。但我的问题是我需要停止音乐时点击按钮。问题是，当我Android Studio媒体播放器播放和暂停
r.id.BUTTONNAME:
mpBm.stop();
break;
的mpBM.stop();有错误它的机壳内键入mpBM.stop()正是在MPBM我认为该命令不能拨打：
MediaPlayer mpBM = MediaPlayer.create(R.raw.ceusong);
我里面的声明上创建。当我尝试将它放在onCreate之外，并且将它放置在onCreate的顶部时LinearLayout ll;以下？它在声明中错误：
MediaPlayer mpBM = MediaPlayer.create(R.raw.ceusong);
谁能告诉我该如何解决？
顺便说一句，我真正想要的是当我按任何按钮音乐停止。
package org.intercode.lifeatceu;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
public class browse extends AppCompatActivity implements View.OnClickListener {
TextView presidentmessage, foreword, missionvision, qualitypolicyandobjectives, expectedgraduateattributes, briefhistory,
fus, degreeprogramofferings, tvAAEP, tvPFOT,tvSGAOFOFA,tvSSAF,tvUSRP,tvCAH,tvEARSA,tvUOAEO,tvCEUMANILA,tvCEUMAKATI
,tvCEUMALOLOS,tvAPPEN,tvSCAO,tvPUBLICATIONS,tvCEAAR,tvPOFMOSCDO,tvGR;
LinearLayout ll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_browse);
presidentmessage = (TextView) findViewById(R.id.presidentmessage);
foreword = (TextView) findViewById(R.id.foreword);
missionvision = (TextView) findViewById(R.id.missionvision);
qualitypolicyandobjectives = (TextView) findViewById(R.id.qualitypolicyandobjectives);
expectedgraduateattributes = (TextView) findViewById(R.id.expectedgraduateattributes);
briefhistory = (TextView) findViewById(R.id.briefhistory);
fus = (TextView) findViewById(R.id.fus);
degreeprogramofferings = (TextView) findViewById(R.id.degreeprogramofferings);
tvAAEP = (TextView) findViewById(R.id.tvAAEP);
tvPFOT = (TextView) findViewById(R.id.tvPFOT);
tvSGAOFOFA = (TextView) findViewById(R.id.tvSGAOFOFA);
tvSSAF = (TextView) findViewById(R.id.tvSSAF);
tvUSRP = (TextView) findViewById(R.id.tvUSRP);
tvCAH = (TextView) findViewById(R.id.tvCAH);
tvEARSA = (TextView) findViewById(R.id.tvEARSA);
tvUOAEO = (TextView) findViewById(R.id.tvUOAEO);
tvCEUMANILA = (TextView) findViewById(R.id.tvCEUMANILA);
tvCEUMAKATI = (TextView) findViewById(R.id.tvCEUMAKATI);
tvCEUMALOLOS = (TextView) findViewById(R.id.tvCEUMALOLOS);
tvAPPEN = (TextView) findViewById(R.id.tvAPPEN);
tvSCAO = (TextView) findViewById(R.id.tvSCAO);
tvPUBLICATIONS = (TextView) findViewById(R.id.tvPUBLICATIONS);
tvCEAAR = (TextView) findViewById(R.id.tvCEAAR);
tvPOFMOSCDO = (TextView) findViewById(R.id.tvPOFMOSCDO);
tvGR = (TextView) findViewById(R.id.tvGR);
presidentmessage.setOnClickListener(this);
foreword.setOnClickListener(this);
missionvision.setOnClickListener(this);
qualitypolicyandobjectives.setOnClickListener(this);
expectedgraduateattributes.setOnClickListener(this);
briefhistory.setOnClickListener(this);
fus.setOnClickListener(this);
degreeprogramofferings.setOnClickListener(this);
tvAAEP.setOnClickListener(this);
tvPFOT.setOnClickListener(this);
tvSGAOFOFA.setOnClickListener(this);
tvSSAF.setOnClickListener(this);
tvUSRP.setOnClickListener(this);
tvCAH.setOnClickListener(this);
tvEARSA.setOnClickListener(this);
tvUOAEO.setOnClickListener(this);
tvCEUMANILA.setOnClickListener(this);
tvCEUMAKATI.setOnClickListener(this);
tvCEUMALOLOS.setOnClickListener(this);
tvAPPEN.setOnClickListener(this);
tvSCAO.setOnClickListener(this);
tvPUBLICATIONS.setOnClickListener(this);
tvCEAAR.setOnClickListener(this);
tvPOFMOSCDO.setOnClickListener(this);
tvGR.setOnClickListener(this);
final MediaPlayer mpBM = MediaPlayer.create(this,R.raw.ceusong);
mpBM.start();
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.presidentmessage:
startActivity(new Intent(this, pm.class));
break;
case R.id.foreword:
startActivity(new Intent(this, F.class));
break;
case R.id.missionvision:
startActivity(new Intent(this, cvmgacv.class));
break;
case R.id.qualitypolicyandobjectives:
startActivity(new Intent(this, cqpao.class));
break;
case R.id.expectedgraduateattributes:
startActivity(new Intent(this, ceega.class));
break;
case R.id.briefhistory:
startActivity(new Intent(this, ceuabh.class));
break;
case R.id.fus:
startActivity(new Intent(this, fus.class));
break;
case R.id.degreeprogramofferings:
startActivity(new Intent(this, fus.class));
break;
case R.id.tvAAEP:
startActivity(new Intent(this, aaep.class));
break;
case R.id.tvPFOT:
startActivity(new Intent(this, PFOT.class));
break;
case R.id.tvSGAOFOFA:
startActivity(new Intent(this, SGAOFOFA.class));
break;
case R.id.tvSSAF:
startActivity(new Intent(this, SSAF.class));
break;
case R.id.tvUSRP:
startActivity(new Intent(this, USRP.class));
break;
case R.id.tvCAH:
startActivity(new Intent(this, CAH.class));
break;
case R.id.tvEARSA:
startActivity(new Intent(this, EARSA.class));
break;
case R.id.tvUOAEO:
startActivity(new Intent(this,UOAEO.class));
break;
case R.id.tvCEUMANILA:
startActivity(new Intent(this,CEUMANILA.class));
break;
case R.id.tvCEUMAKATI:
startActivity(new Intent(this,CEUMAKATI.class));
break;
case R.id.tvCEUMALOLOS:
startActivity(new Intent(this,CEUMALOLOS.class));
break;
case R.id.tvAPPEN:
startActivity(new Intent(this,Appendices.class));
break;
case R.id.tvSCAO:
startActivity(new Intent(this, Appendices.class));
break;
case R.id.tvPUBLICATIONS:
startActivity(new Intent(this, PUBLICATION.class));
break;
case R.id.tvCEAAR:
startActivity(new Intent(this, CEAAR.class));
break;
case R.id.tvPOFMOSCDO:
startActivity(new Intent(this, POFMOSCDO.class));
break;
case R.id.tvGR:
startActivity(new Intent(this, GR.class));
break;
}
}
}
'mpBM'属于'onCreate'本地，因此在'onClick'中不可见。 – Michael
是的，当我将它移动到活动类的一部分时，活动不会只是打开并且错误来自该声明 –
因此，移动声明但在“onCreate”中保留初始化（您将不得不移除“final”）。 – Michael