我正在创建一个应用程序，我在Gridlayout中放置10个按钮，在每个按钮上都有一个分配给它的音频文件＆amp;它应该在相应的按钮上播放该音频单击但是在 ＆＃34;第一种方法不起作用＆＃34; 所以我写了长代码并创建了＆＃34;第二种方法＆＃34;它正在工作但是点击第10个按钮然后我再次点击第1个按钮声音不起作用？
package com.example.star.spanishnumbers;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
public class MainActivity extends AppCompatActivity {
//1st Method
/*public void playmusic(View view)
{
int id = view.getId();
Log.i("ID","Id value is" + id);
String nameID;
nameID = view.getResources().getResourceEntryName(id);
Log.i("ID","Id value is" + nameID);
int myMusic = getResources().getIdentifier(nameID,"raw","com.example.star.spanishnumbers");
MediaPlayer mediaplayer = MediaPlayer.create(this, myMusic);
mediaplayer.start();
mediaplayer.reset();
mediaplayer.release();
}*/
//2nd Method ~ working but have some issues unable to clear that issue
public void playone(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer= MediaPlayer.create(this,R.raw.one);
mediaPlayer.start();
}
public void playtwo(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.two);
mediaPlayer.start();
}
public void playthree(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.three);
mediaPlayer.start();
}
public void playfour(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.four);
mediaPlayer.start();
}
public void playfive(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.five);
mediaPlayer.start();
}
public void playsix(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer= MediaPlayer.create(this,R.raw.six);
mediaPlayer.start();
}
public void playseven(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.seven);
mediaPlayer.start();
}
public void playeight(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.eight);
mediaPlayer.start();
}
public void playnine(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.nine);
mediaPlayer.start();
}
public void playten(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.ten);
mediaPlayer.start();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
布局代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.star.spanishnumbers.MainActivity">
<GridLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp">
<Button
android:id="@+id/one"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="0"
android:layout_rowWeight="1"
android:background="@drawable/one"
android:onClick="playmusic"
android:text="@string/one"
tools:text="@string/one" />
<Button
android:id="@+id/two"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="0"
android:layout_rowWeight="1"
android:background="@drawable/two"
android:onClick="playmusic"
android:text="@string/two"
tools:text="@string/two" />
<Button
android:id="@+id/three"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="1"
android:layout_rowWeight="1"
android:background="@drawable/three"
android:onClick="playmusic"
android:text="@string/three"
tools:text="@string/three" />
<Button
android:id="@+id/four"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="1"
android:layout_rowWeight="1"
android:background="@drawable/four"
android:onClick="playmusic"
android:text="@string/four"
tools:text="@string/four" />
<Button
android:id="@+id/five"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="2"
android:layout_rowWeight="1"
android:background="@drawable/five"
android:onClick="playmusic"
android:text="@string/five"
tools:text="@string/five" />
<Button
android:id="@+id/six"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="2"
android:layout_rowWeight="1"
android:background="@drawable/six"
android:onClick="playmusic"
android:text="@string/six"
tools:text="@string/six" />
<Button
android:id="@+id/seven"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="3"
android:layout_rowWeight="1"
android:background="@drawable/one"
android:onClick="playmusic"
android:text="@string/seven"
tools:text="@string/seven" />
<Button
android:id="@+id/eight"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="3"
android:layout_rowWeight="1"
android:background="@drawable/four"
android:onClick="playmusic"
android:text="@string/eight"
tools:text="@string/eight" />
<Button
android:id="@+id/nine"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="4"
android:layout_rowWeight="1"
android:background="@drawable/six"
android:onClick="playmusic"
android:text="@string/nine"
tools:text="@string/nine" />
<Button
android:id="@+id/ten"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="4"
android:layout_rowWeight="1"
android:background="@drawable/three"
android:onClick="playmusic"
android:text="@string/ten"
tools:text="@string/ten" />
</GridLayout>
</android.support.constraint.ConstraintLayout>
答案 0 :(得分：0)
Android MediaPlayer资源匮乏。如果您在使用后没有清理（发布）MadiaPlayer，您的应用程序只能播放十几个或更少的音频或视频。由于MediaPlayer引用是局部变量，因此无法清除。
将mediaPlayer参考从局部变量更改为字段变量并在使用后释放mediaPlayer。 （例如使用onCompleteListener） 不要忘记在上下文被破坏时释放。（活动，服务......等）
public void playthree(View view)
{
int id = view.getId();
Log.i("ID", "ID value is " + id);
MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.three);
mediaPlayer.start();
// mediaPlayer can not be released.
}