我的应用程序的一部分有两个按钮，当点击其中任何一个时，它们每个都发出声音。除了第二次按下“下一步”按钮外，声音播放完美。我可以按下这个按钮100次，它总共可以工作99次，但由于某种原因我第二次点击它，音频永远不会播放，我无法弄清楚原因。它总是在第二次按下它不播放。
package com.example.otapp;
import java.util.ArrayList;
import java.util.List;
import com.example.otapp.*;
import com.example.otapp.R.raw;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.ActionBar.LayoutParams;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.os.Build;
public class DisplayMessageActivity extends MainActivity {
ViewGroup relativeLayout;
private Button taskButton;
private Button nextButton;
private String taskImageName, taskText;
private String highlightedImageName;
private int taskCount;
private String list;
private Intent blah;
private MediaPlayer check, next;
private int textWidth;
TextView taskTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
// set the task number to the first task
taskCount = 1;
// Get access to the buttons
taskButton = (Button) findViewById(R.id.task);
nextButton = (Button) findViewById(R.id.next);
Intent intent = getIntent();
// see which list user wants to display
list = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
View taskButtonTemp = taskButton;
View nextButtonTemp = nextButton;
taskTextView = (TextView) findViewById(R.id.textView);
taskTextView.setTextSize(20);
RelativeLayout.LayoutParams params2 = (android.widget.RelativeLayout.LayoutParams) taskButtonTemp.getLayoutParams();
RelativeLayout.LayoutParams params3 = (android.widget.RelativeLayout.LayoutParams) nextButtonTemp.getLayoutParams();
params2.height = Screen_Height/3;
params2.width = Screen_Height/3;
params3.height = Screen_Height/3;
params3.width = Screen_Height/3;
taskButtonTemp.setLayoutParams(params2);
nextButtonTemp.setLayoutParams(params3);
// get the first task
getTask(taskCount);
// put the first task on the screen
taskButton.setBackgroundResource(getResources().getIdentifier(taskImageName, "drawable", getPackageName()));
// check if buttons are clicked
taskButton.setOnClickListener(onClickListener);
nextButton.setOnClickListener(onClickListener);
blah = new Intent(this, MainActivity.class);
blah.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// set the 'next' button invisible initially
nextButton.setVisibility(View.GONE);
check = MediaPlayer.create(DisplayMessageActivity.this, raw.check);
next = MediaPlayer.create(DisplayMessageActivity.this, raw.next);
}
private OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
// do different things for each different button
switch(v.getId()) {
// if you press the task button
case R.id.task:
// play sound
check.start();
// show the next button
nextButton.setVisibility(View.VISIBLE);
break;
// if the next button is pressed
case R.id.next:
// play sound
next.start();
// next task
taskCount++;
// get next task
getTask(taskCount);
// if we havent went through the task list
if(taskImageName.equals("finished") == true)
{
// if we did, go back to main menu
startActivity(blah);
}
// show the task
taskButton.setBackgroundResource(getResources().getIdentifier(taskImageName, "drawable", getPackageName()));
// hide the next button
nextButton.setVisibility(View.GONE);
break;
}
}
};
private String getTask(int taskCount) {
// based on whatever list we are supposed to show
switch(list) {
case "Get Up":
// get the current task we are supposed to show from that list
switch(taskCount) {
case 1:
taskImageName = "alarm";
taskTextView.setText("Turn Off The Alarm");
break;
case 2:
taskImageName = "bed";
taskTextView.setText("Get Out of Bed");
break;
case 3:
taskImageName = "toilet";
taskTextView.setText("Go To The Toilet");
break;
case 4:
taskImageName = "toothbrush";
taskTextView.setText("Brush Your Teeth");
break;
case 5:
taskImageName = "sink";
taskTextView.setText("Wash Your Hands And Face");
break;
case 6:
taskImageName = "finished";
break;
}
break;
case "Get Dressed":
switch(taskCount) {
case 1:
taskImageName = "pyjamas";
taskTextView.setText("Take Off Pyjamas");
break;
case 2:
taskImageName = "underwear2";
taskTextView.setText("Take Off Underwear");
break;
case 3:
taskImageName = "underwear";
taskTextView.setText("Put On Clean Underwear");
break;
case 4:
taskImageName = "vest";
taskTextView.setText("Put On Vest");
break;
case 5:
taskImageName = "shirt";
taskTextView.setText("Put On Shirt");
break;
case 6:
taskImageName = "tie";
taskTextView.setText("Put On Tie");
break;
case 7:
taskImageName = "jumper";
taskTextView.setText("Put On Jumper");
break;
case 8:
taskImageName = "socks";
taskTextView.setText("Put On Socks");
break;
case 9:
taskImageName = "trousers";
taskTextView.setText("Put On Pants");
break;
case 10:
taskImageName = "shoes";
taskTextView.setText("Put On Shoes");
break;
case 11:
taskImageName = "brush";
taskTextView.setText("Brush Your Hair");
break;
case 12:
taskImageName = "finished";
break;
}
break;
}
return taskImageName;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
答案 0 :(得分：0)
Hey Jake我在github上有一个按钮播放器非常好用。你可以看看我在那堂课里做了什么。
https://github.com/rbeltran/breathe/blob/master/src/com/jphat/Breathe/util/ButtonPlayer.java
它可能是您需要的releasePlayer.prepare（）方法或您可能想要调用的release（）。