Android MediaPlayer进行音频播放的工具类，回调各种状态方便开发使用。

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.minlukj.audioplay"
+        minSdkVersion 26
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+  implementation fileTree(include: ['*.jar'], dir: 'libs')
+  implementation 'com.android.support:appcompat-v7:28.0.0'
+  implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+  testImplementation 'junit:junit:4.12'
+  androidTestImplementation 'com.android.support.test:runner:1.0.2'
+  androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+  implementation project(':mediaplaylib')
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/minlukj/audioplay/ExampleInstrumentedTest.java

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+package com.minlukj.audioplay;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class) public class ExampleInstrumentedTest {
+  @Test public void useAppContext() {
+    // Context of the app under test.
+    Context appContext = InstrumentationRegistry.getTargetContext();
+
+    assertEquals("com.minlukj.audioplay", appContext.getPackageName());
+  }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.minlukj.audioplay">
+  <uses-permission android:name="android.permission.INTERNET"/>
+  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+  <application
+      android:allowBackup="true"
+      android:icon="@mipmap/ic_launcher"
+      android:label="@string/app_name"
+      android:roundIcon="@mipmap/ic_launcher_round"
+      android:supportsRtl="true"
+      android:theme="@style/AppTheme">
+    <activity android:name=".MainActivity">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN"/>
+
+        <category android:name="android.intent.category.LAUNCHER"/>
+      </intent-filter>
+    </activity>
+  </application>
+
+</manifest>

app/src/main/java/com/minlukj/audioplay/MainActivity.java

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+package com.minlukj.audioplay;
+
+import android.media.MediaPlayer;
+import android.os.Bundle;
+import android.os.Environment;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import com.minlukj.mediaplaylib.MediaPlayFunctionListener;
+import com.minlukj.mediaplaylib.MediaPlayInfoListener;
+import com.minlukj.mediaplaylib.MediaPlayerUtils;
+import java.io.File;
+
+import static com.minlukj.mediaplaylib.MediaPlayerUtils.PLAY_STATE0;
+import static com.minlukj.mediaplaylib.MediaPlayerUtils.PLAY_STATE1;
+import static com.minlukj.mediaplaylib.MediaPlayerUtils.PLAY_STATE2;
+import static com.minlukj.mediaplaylib.MediaPlayerUtils.PLAY_STATE3;
+
+public class MainActivity extends AppCompatActivity {
+
+  private String TAG = MainActivity.class.getCanonicalName();
+
+  private ProgressBar mMusicProgressBar,mMusicNetProgressBar;
+  private Button mFile,mRaw,mAssets,mNet,mStart,mPause,mStop;
+  private TextView mMusicType;
+
+  private MediaPlayerUtils mMediaPlayerUtils;
+  @Override protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_main);
+    mMusicProgressBar = findViewById(R.id.music_progressBar);
+    mMusicNetProgressBar = findViewById(R.id.music_net_progressBar);
+    mFile = findViewById(R.id.music_file);
+    mRaw = findViewById(R.id.music_raw);
+    mAssets = findViewById(R.id.music_assets);
+    mNet = findViewById(R.id.music_net);
+    mStart = findViewById(R.id.music_start);
+    mPause = findViewById(R.id.music_pause);
+    mStop = findViewById(R.id.music_stop);
+    mMusicType = findViewById(R.id.music_type);
+    mMusicNetProgressBar.setMax(100);
+
+    mMediaPlayerUtils = new MediaPlayerUtils();
+    initOnClick();
+    mMediaPlayerUtils.setMediaPlayFunctionListener(new MediaPlayFunctionListener() {
+      @Override public void prepared() {
+        //准备完毕
+        Log.i(TAG,"准备完毕自动开始播放");
+      }
+
+      @Override public void start() {
+        //开始播放
+        mMusicProgressBar.setMax(mMediaPlayerUtils.getDuration());
+      }
+
+      @Override public void pause() {
+        //暂停播放
+        Log.i(TAG,"暂停了播放");
+      }
+
+      @Override public void stop() {
+        //停止播放
+        Log.i(TAG,"停止了播放");
+      }
+
+      @Override public void reset() {
+        //重置
+        Log.i(TAG,"重置了播放");
+      }
+    });
+
+    mMediaPlayerUtils.setMediaPlayInfoListener(new MediaPlayInfoListener() {
+      @Override public void onError(MediaPlayer mp, int what, int extra) {
+        //错误监听
+        Log.e(TAG,"播放错误");
+      }
+
+      @Override public void onCompletion(MediaPlayer mediaPlayer) {
+        //播放完成监听
+        Log.i(TAG,"播放完成");
+      }
+
+      @Override public void onBufferingUpdate(MediaPlayer mediaPlayer, int i) {
+        //网络缓冲进度监听
+        Log.i(TAG,String.valueOf(i));
+        mMusicNetProgressBar.setProgress(i);
+      }
+
+      @Override public void onSeekComplete(MediaPlayer mediaPlayer) {
+        //进度调整监听
+        Log.i(TAG,"调整了进度");
+      }
+
+      @Override public void onSeekBarProgress(int progress) {
+        //播放进度监听
+        mMusicProgressBar.setProgress(progress);
+      }
+    });
+  }
+
+  private void initOnClick() {
+    mFile.setOnClickListener(mOnClickListener);
+    mRaw.setOnClickListener(mOnClickListener);
+    mAssets.setOnClickListener(mOnClickListener);
+    mNet.setOnClickListener(mOnClickListener);
+    mStart.setOnClickListener(mOnClickListener);
+    mPause.setOnClickListener(mOnClickListener);
+    mStop.setOnClickListener(mOnClickListener);
+  }
+
+  private View.OnClickListener mOnClickListener = new View.OnClickListener() {
+    @Override public void onClick(View v) {
+      if (v == mFile){
+        //播放本地文件
+        mMediaPlayerUtils.setFilePlay(new File(Environment.getExternalStorageDirectory(),"music.mp3"));
+      }else if (v == mRaw){
+        //播放Raw
+        mMediaPlayerUtils.setRawPlay(MainActivity.this,R.raw.music3);
+      }else if (v == mAssets){
+        //播放Assets
+        mMediaPlayerUtils.setAssetsName(MainActivity.this,"music2.mp3");
+      }else if (v == mNet){
+        //播放网络资源
+        mMediaPlayerUtils.setNetPath("http://www.minlukj.com/music.mp3");
+      }else if (v == mStart){
+        //开始播放
+        mMediaPlayerUtils.start();
+        switch (mMediaPlayerUtils.getMusicType()){
+          case PLAY_STATE0:
+            mMusicType.setText("正在播放文件类型");
+            break;
+          case PLAY_STATE1:
+            mMusicType.setText("正在播放RAW下文件资源");
+            break;
+          case PLAY_STATE2:
+            mMusicType.setText("正在播放ASSETS文件下资源");
+            break;
+          case PLAY_STATE3:
+            mMusicType.setText("正在播放网络资源");
+            break;
+
+        }
+      }else if (v == mPause){
+        //暂停播放
+        mMediaPlayerUtils.pause();
+      }else if (v == mStop){
+        //停止播放
+        mMediaPlayerUtils.stop();
+      }
+    }
+  };
+
+  @Override protected void onDestroy() {
+    super.onDestroy();
+    if (mMediaPlayerUtils != null)
+      mMediaPlayerUtils.destory();
+  }
+
+  @Override protected void onResume() {
+    super.onResume();
+    if (mMediaPlayerUtils != null)
+      mMediaPlayerUtils.resume();
+  }
+
+  @Override protected void onPause() {
+    super.onPause();
+    if (mMediaPlayerUtils != null)
+      mMediaPlayerUtils.pause();
+  }
+}