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我正在创建一个测验应用程序。在10到12个问题之后，Medvoice不会在正确或错误的问题后提出。我得到这个错误MediaPlayer（-19，0）和从设置缓存，启用name = sound_effects，值= 0。请指导我解决这个错误。谢谢Android MediaPlayer未经发布而完成
我正在使用此代码。声音可播放8到10次，然后声音消失。如果我们等待一段时间，并在一段时间后再次点击按钮，声音开始播放。它也在一段时间后崩溃。
package com.kids_fun;
import java.util.Arrays;
import java.util.Collections;
import java.util.Random;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;
import android.widget.Toast;
public class HardAddition extends Activity {
RadioGroup options;
RadioButton answer1,answer2, answer3;
TextView Num1,Num2,Counter, Answer,check_answer1;
int Result, z, Score=00;
final Random rand= new Random();
CountDownTimer timer1;
Button Submit,Next;
ImageView Image;
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hard__addition);
// Getting RadioButtons, TextViews
options=(RadioGroup)findViewById(R.id.Hard_Add_RdGrp);
answer1=(RadioButton)findViewById(R.id.Hard_Add_answer1);
answer2=(RadioButton)findViewById(R.id.Hard_Add_Answer2);
answer3=(RadioButton)findViewById(R.id.Hard_Add_Answer3);
Num1=(TextView)findViewById(R.id.Hard_Add_Num1_ID);
Num2=(TextView)findViewById(R.id.Hard_Add_Num2_ID);
Counter=(TextView)findViewById(R.id.Hard_Additon_Counter);
Answer=(TextView)findViewById(R.id.Hard_Additon_Answer);
check_answer1=(TextView)findViewById(R.id.Hard_Addition_checked_answer);
Image=(ImageView)findViewById(R.id.Hard_Addition_ImageView);
//Setting Timer
timer1 = new CountDownTimer(15000, 1000) {
public void onTick(long millisUntilFinished) {
Counter.setText(""
+ formatTime(millisUntilFinished));
}
private String formatTime(long millis) {
// TODO Auto-generated method stub
String output = "00";
long seconds = millis/1000;
//long minutes = seconds/60;
seconds = seconds % 60;
//minutes = minutes % 60;
String secondsD = String.valueOf(seconds);
//String minutesD = String.valueOf(minutes);
if (seconds < 10)
{ secondsD = "0" + seconds;
}
//if (minutes < 10)
// minutesD = "0" + minutes;
output =secondsD;
return output;
}
public void onFinish() {
Counter.setText("");
//Counter_Dialog();
CustomDialogClass cdd=new CustomDialogClass(HardAddition.this);
cdd.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
cdd.show();
}
};
//Calling Method to generate Numbers Randomly
getRandom();
// Starting Timer
timer1.start();
options.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// TODO Auto-generated method stub
check_answer();
}
});
// Submit Button to check the answer
Submit=(Button)findViewById(R.id.Hrd_AddOK_Btn_ID);;
Submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
MediaPlayer mp=MediaPlayer.create(HardAddition.this, R.raw.tick);
mp.start();
timer1.cancel();
Submit.setVisibility(View.INVISIBLE);
//Calling Method which will check the answer defined below
isCorrect();
}
});
}
//Method to Generate Numbers Randomly
public void getRandom()
{
int FirstNum= rand.nextInt((1000-500)+1)+500;
Num1.setText(String.valueOf(FirstNum));
int SecondNum= rand.nextInt((5000-1000)+1)+1000;
Num2.setText(String.valueOf(SecondNum));
int x= Integer.parseInt(Num1.getText().toString());
int y= Integer.parseInt(Num2.getText().toString());
Result=x+y;
answer2.setText(String.valueOf(Result));
int option_value1;
do{
option_value1 =rand.nextInt((2000-500)+1)+500;
}
while(option_value1==Result);
answer1.setText(String.valueOf(option_value1));
int option_value2;
do{
option_value2 =rand.nextInt((3000-1500)+1)+1500;
}
while(option_value2==Result);
answer3.setText(String.valueOf(option_value2));
int a=Integer.parseInt(answer1.getText().toString());
int b=Integer.parseInt(answer2.getText().toString());
int c=Integer.parseInt(answer3.getText().toString());
Integer[] options = {a, b , c };
Collections.shuffle(Arrays.asList(options));
// assign the value choice
a = options[0];
b = options[1];
c = options[2];
answer1.setText(String.valueOf(a));
answer2.setText(String.valueOf(b));
answer3.setText(String.valueOf(c));
}
// Method to check the answer
public void isCorrect()
{
if(answer1.isChecked()==false && answer2.isChecked()==false && answer3.isChecked()==false)
{
Toast.makeText(getApplicationContext(), "Please Select One Option", Toast.LENGTH_SHORT).show();
Submit.setVisibility(View.VISIBLE);
}
else if(answer1.isChecked())
{
Image.setVisibility(View.VISIBLE);
z=Integer.parseInt(answer1.getText().toString());
if(z==Result)
{
//Displaying Image
Image.setBackgroundResource(R.drawable.a);
//Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.wow);
mp.start();
//Increamenting Score
increamentscore();
//Generating New Question
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
else{
//Displaying Image
Image.setBackgroundResource(R.drawable.r);
//Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.okay);
mp.start();
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
}
else if(answer2.isChecked())
{ Image.setVisibility(View.VISIBLE);
z=Integer.parseInt(answer2.getText().toString());
if(z==Result)
{
//Displaying Image
Image.setBackgroundResource(R.drawable.b);
//Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.wow);
mp.start();
Increamenting Score
increamentscore();
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
else{
//Displaying Image
Image.setBackgroundResource(R.drawable.r);
//Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.okay);
mp.start();
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
}
else if(answer3.isChecked())
{
Image.setVisibility(View.VISIBLE);
z=Integer.parseInt(answer3.getText().toString());
if(z==Result)
{
//Displaying Image
Image.setBackgroundResource(R.drawable.a);
// Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.wow);
mp.start();
increamentscore();
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
else{
//Displaying Image
Image.setBackgroundResource(R.drawable.r);
//Playing Sound
mp=MediaPlayer.create(HardAddition.this, R.raw.okay);
mp.start();
final Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Questions();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
mp.stop();
mp.release();
}
}, 3500);
}
}
}
public void Counter_Dialog() {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Time is Up !!!")
.setMessage(
"Your Time is Up, Press Next to Move to the Next Question")
// .setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton("Next",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
mp=MediaPlayer.create(getApplicationContext(), R.raw.tick);
mp.start();
Questions();
//timer1.start();
answer1.setChecked(false);
answer2.setChecked(false);
answer3.setChecked(false);
}
})
// .setNegativeButton("No", null)
.show();
}
// Increamenting Score
public int increamentscore() {
if(Score<99)
{
Score = Score + 1;
Answer.setText(String.valueOf(Score));
}
else{
Score=0;
}
return Score;
}
// Generating New Question
public void Questions() {
Image.setVisibility(View.GONE);
getRandom();
timer1.start();
options.clearCheck();
check_answer1.setText(String.valueOf(""));
Submit.setVisibility(View.VISIBLE);
}
// Checking the value of Checked Answer by the User
public void check_answer()
{ int y;
switch(options.getCheckedRadioButtonId())
{
case R.id.Hard_Add_answer1:
y=Integer.parseInt(answer1.getText().toString());
check_answer1.setText(String.valueOf(y));
break;
case R.id.Hard_Add_Answer2:
y=Integer.parseInt(answer2.getText().toString());
check_answer1.setText(String.valueOf(y));
break;
case R.id.Hard_Add_Answer3:
y=Integer.parseInt(answer3.getText().toString());
check_answer1.setText(String.valueOf(y));
break;
}
}
// Dialog which will display on When Time is UP
public class CustomDialogClass extends Dialog implementsandroid.view.View.OnClickListener
{
public Activity c;
public Dialog d;
public CustomDialogClass(Activity a) {
super(a);
// TODO Auto-generated constructor stub
this.c = a;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.dialog_box);
Next = (Button) findViewById(R.id.dialog_Next);
Next.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.dialog_Next:
mp=MediaPlayer.create(getApplicationContext(), R.raw.tick);
mp.start();
Questions();
break;
default:
break;
}
dismiss();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.hard__addition, menu);
return true;
}
}
我正在使用mp.release（）;我在20到25个问题后仍面临同样的问题。语音消失问题 –
我也用过mp.prepare（）。按钮它比简单的mp.release（）更糟糕。 –
如果我们保持一段时间并再次点击按钮，它会开始播放声音。 –