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android - 如何在android中添加播放和停止不同的按钮歌曲

问题描述

我正在为 Android 制作应用程序，并且制作了播放和暂停按钮。我的播放按钮和暂停按钮已设置，所以当我单击播放或暂停按钮时，它首先会运行，但在按钮二中它不起作用。代码如下。

MainActivity.java

package com.example.cdp.keroncong;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.media.MediaPlayer;
import android.view.View;


public class MainActivity extends Activity {

    MediaPlayer mplayer;

    public void playAudio(View view) {

        mplayer.start();

    }

    public void pauseAudio(View view) {

        mplayer.stop();

    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mplayer = MediaPlayer.create(this, R.raw.Button1);
       //mplayer = MediaPlayer.create(this, R.raw.Button1);


       }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

谢谢之前

标签： android

解决方案

这是我的 activity_main.xml

**activity_main.xml**

<?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=".MainActivity"
    android:id="@+id/relativeLayout">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Play"
        android:id="@+id/orange"
        android:layout_below="@+id/textView"
        android:layout_alignParentEnd="true"
        android:layout_marginEnd="215dp"
        android:onClick="playAudio" />

    <Button
        android:id="@+id/pauseButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/playButton"
        android:layout_below="@+id/playButton"
        android:onClick="pauseAudio"
        android:text="Pause"
        tools:layout_editor_absoluteX="88dp"
        tools:layout_editor_absoluteY="58dp" />

    <Button
        android:id="@+id/banana"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/orange"
        android:layout_below="@+id/orange"
        android:onClick="playAudio"
        android:text="Play"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="58dp" />

    <Button
        android:id="@+id/pauseButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/orange"
        android:onClick="pauseAudio"
        android:text="Pause"
        tools:layout_editor_absoluteX="88dp"
        tools:layout_editor_absoluteY="0dp" />


</android.support.constraint.ConstraintLayout>

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