当按下操作栏上的操作按钮时，我正在尝试播放存储在资源下的原始文件夹中的视频文件，但是当我按下操作按钮时，应用程序崩溃，表示已经释放错误＆＃39;表面已被释放错误＆＃ 39 ;.这是我在onOptionsItemSelected（）
下的媒体播放器代码package com.example.TheWeddingApp;
import java.io.IOException;
import android.app.ActionBar;
import android.content.res.Configuration;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends FragmentActivity {
final String[] data ={"Home","Venue","Gallery","Meet the Groom","Meet the Bride"};
final String[] fragments ={
"com.example.TheWeddingApp.FragmentOne",
"com.example.TheWeddingApp.FragmentTwo",
"com.example.TheWeddingApp.FragmentThree",
"com.example.TheWeddingApp.FragmentFour",
"com.example.TheWeddingApp.FragmentFive"};
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
SurfaceHolder surfaceHolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActionBar().getThemedContext(), android.R.layout.simple_list_item_1, data);
ActionBar bar = getActionBar();
bar.setIcon(android.R.color.transparent);
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#990000")));
final DrawerLayout drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
drawer, /* DrawerLayout object */
R.drawable.ic_launcher2, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
) {
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu();
}
};
drawer.setDrawerListener(mDrawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
final ListView navList = (ListView) findViewById(R.id.drawer);
navList.setAdapter(adapter);
navList.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, final int pos,long id){
drawer.setDrawerListener( new DrawerLayout.SimpleDrawerListener(){
@Override
public void onDrawerClosed(View drawerView){
super.onDrawerClosed(drawerView);
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main, Fragment.instantiate(MainActivity.this, fragments[pos]));
tx.commit();
}
});
drawer.closeDrawer(navList);
}
});
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main,Fragment.instantiate(MainActivity.this, fragments[0]));
tx.commit();
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_bar, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId())
{
case R.id.action_play:
Toast.makeText(this, "Play clicked", Toast.LENGTH_SHORT).show();
setContentView(R.layout.video_activity);
SurfaceView surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.setFixedSize(176, 144);
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(surfaceHolder);
if (mediaPlayer.isPlaying()) {
mediaPlayer.reset();
}
try {
mediaPlayer.setDataSource("android.resource://" + getPackageName() + "/" +"wildlife");
mediaPlayer.prepare();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
return true;
}
return super.onOptionsItemSelected(item);
}
}
video_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/videolayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
和logcat
02-07 18:27:44.358: E/AndroidRuntime(18440): FATAL EXCEPTION: main
02-07 18:27:44.358: E/AndroidRuntime(18440): Process: com.example.TheWeddingApp, PID: 18440
02-07 18:27:44.358: E/AndroidRuntime(18440): java.lang.IllegalArgumentException: The surface has been released
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.media.MediaPlayer._setVideoSurface(Native Method)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.media.MediaPlayer.setDisplay(MediaPlayer.java:688)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.example.TheWeddingApp.MainActivity.onOptionsItemSelected(MainActivity.java:134)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.app.Activity.onMenuItemSelected(Activity.java:2608)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:361)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1012)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:741)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:884)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:546)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:115)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.view.View.performClick(View.java:4456)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.view.View$PerformClick.run(View.java:18465)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.os.Handler.handleCallback(Handler.java:733)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.os.Handler.dispatchMessage(Handler.java:95)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.os.Looper.loop(Looper.java:136)
02-07 18:27:44.358: E/AndroidRuntime(18440): at android.app.ActivityThread.main(ActivityThread.java:5086)
02-07 18:27:44.358: E/AndroidRuntime(18440): at java.lang.reflect.Method.invokeNative(Native Method)
02-07 18:27:44.358: E/AndroidRuntime(18440): at java.lang.reflect.Method.invoke(Method.java:515)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
02-07 18:27:44.358: E/AndroidRuntime(18440): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
02-07 18:27:44.358: E/AndroidRuntime(18440): at dalvik.system.NativeStart.main(Native Method)
似乎无法弄清楚问题，感谢任何帮助！
答案 0 :(得分：0)
您的活动还应实施：implements SurfaceHolder.Callback并将mediaPlayer.setDisplay(surfaceHolder);置于覆盖public void surfaceCreated(SurfaceHolder holder)方法中。
@Override
public void surfaceCreated(SurfaceHolder holder) {
mediaPlayer.setDisplay(holder);
}