#88 #90 #94 #95 #181 已完成全部实验

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901101/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="edu.hzuapps.androidworks.homework.com1314080901101">
+
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name">
+        <activity
+            android:name="edu.hzuapps.androidworks.homework.com1314080901101.MainActivity"
+            android:label="@string/app_name">
+            <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/edu/hzuapps/androidworks/homeworks/com1314080901101/MainActivity.java

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+package edu.hzuapps.androidworks.homework.com1314080901101;
+
+import android.app.Activity;
+import android.graphics.drawable.AnimationDrawable;
+import android.media.MediaPlayer;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.hzuapps.androidworks.homework.com1314080901101.view.AudioRecorderButton;
+import edu.hzuapps.androidworks.homework.com1314080901101.view.MediaManager;
+
+public class MainActivity extends Activity {
+
+    private ListView mListView;
+    private ArrayAdapter<Recorder> mAdapter;
+    private List<Recorder> mDatas = new ArrayList<>();
+    private AudioRecorderButton mAudioRecorderButton;
+    private View animView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.com1314080901101_activity_main);
+
+        mListView = (ListView) findViewById(R.id.lv);
+        mAudioRecorderButton = (AudioRecorderButton) findViewById(R.id.recorder_button);
+        mAudioRecorderButton.setAudioFinishRecorderListener(new AudioRecorderButton.AudioFinishRecorderListener() {
+            @Override
+            public void onFinish(float seconds, String filePath) {
+                Recorder recorder = new Recorder(seconds, filePath);
+                mDatas.add(recorder);
+                mAdapter.notifyDataSetChanged();//通知更新的内容
+                mListView.setSelection(mDatas.size() - 1);//将lisview设置为最后一个
+            }
+        });
+
+        mAdapter = new RecorderAdapter(this, mDatas);
+        mListView.setAdapter(mAdapter);
+
+        //listView的item点击事件
+        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                if (animView != null) {
+                    animView.setBackgroundResource(R.drawable.com1314080901101_adj);
+                    animView = null;
+                }
+                //播放动画
+                animView = view.findViewById(R.id.recorder_anim);
+                animView.setBackgroundResource(R.drawable.com1314080901101_play_anim);
+                AnimationDrawable anim = (AnimationDrawable) animView.getBackground();
+                anim.start();
+                //播放音频
+                MediaManager.playSound(mDatas.get(position).filePath, new MediaPlayer.OnCompletionListener() {
+
+                    @Override
+                    public void onCompletion(MediaPlayer mp) {
+                        animView.setBackgroundResource(R.drawable.com1314080901101_adj);
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        MediaManager.pause();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        MediaManager.resume();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        MediaManager.release();
+    }
+
+    class Recorder {
+        float time;
+        String filePath;
+
+        public Recorder(float time, String filePath) {
+            super();
+            this.time = time;
+            this.filePath = filePath;
+        }
+
+        public void setTime(float time) {
+            this.time = time;
+        }
+
+        public void setFilePath(String filePath) {
+            this.filePath = filePath;
+        }
+
+        public float getTime() {
+
+            return time;
+        }
+
+        public String getFilePath() {
+            return filePath;
+        }
+    }
+}

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901101/RecorderAdapter.java

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+package edu.hzuapps.androidworks.homework.com1314080901101;
+
+import android.content.Context;
+import android.util.DisplayMetrics;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.WindowManager;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+import java.util.List;
+
+import edu.hzuapps.androidworks.homework.com1314080901101.MainActivity.Recorder;
+
+public class RecorderAdapter extends ArrayAdapter<Recorder> {
+    private List<Recorder> mDatas;
+    private Context mContext;
+
+    private int mMinItemWidth;
+    private int mMaxItemWidth;
+    private LayoutInflater mInflater;
+
+    public RecorderAdapter(Context context, List<Recorder> datas) {
+        super(context, -1, datas);
+        mContext = context;
+        mDatas = datas;
+
+        //获取屏幕的宽度
+        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        DisplayMetrics outMetrics = new DisplayMetrics();
+        wm.getDefaultDisplay().getMetrics(outMetrics);
+
+        mMaxItemWidth = (int) (outMetrics.widthPixels * 0.7f);
+        mMinItemWidth = (int) (outMetrics.widthPixels * 0.15f);
+
+        mInflater = LayoutInflater.from(mContext);
+    }
+
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        ViewHolder holder;
+        if (convertView == null) {
+            convertView = mInflater.inflate(R.layout.com1314080901101_item_recorder, parent, false);
+            holder = new ViewHolder();
+            holder.seconds = (TextView) convertView.findViewById(R.id.recorder_time);
+            holder.length = convertView.findViewById(R.id.recorder_length);
+            convertView.setTag(holder);
+        } else {
+            holder = (ViewHolder) convertView.getTag();
+        }
+        holder.seconds.setText(Math.round(getItem(position).time) + "\"");
+        ViewGroup.LayoutParams lp = holder.length.getLayoutParams();
+        lp.width = (int) (mMinItemWidth + (mMaxItemWidth / 60f) * getItem(position).time);
+
+        return convertView;
+    }
+
+    private class ViewHolder {
+        TextView seconds; //时间
+        View length; //长度
+    }
+}

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901101/view/AudioManager.java

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+package edu.hzuapps.androidworks.homework.com1314080901101.view;
+
+import android.media.MediaRecorder;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.UUID;
+
+public class AudioManager {
+    private MediaRecorder mMediaRecorder;
+    private String mDir;
+    private String mCurrentFilePath;
+    private boolean isPrepared;
+
+    private static AudioManager mInstance;
+
+    public static AudioManager getmInstance(String dir) {
+        if (mInstance == null) {
+            synchronized (AudioManager.class) {
+                if (mInstance == null) {
+                    mInstance = new AudioManager(dir);
+                }
+            }
+        }
+        return mInstance;
+    }
+
+    public AudioManager(String dir) {
+        this.mDir = dir;
+    }
+
+    public AudioStateListener mListener;
+
+    /**
+     * 回调准备完毕
+     */
+    public interface AudioStateListener {
+        void wellPrepared();
+    }
+
+    public void setOnAudioStateListener(AudioStateListener listener) {
+        mListener = listener;
+    }
+
+    /**
+     * 准备
+     */
+    public void prepareAudio() {
+
+        try {
+            isPrepared = false;
+
+            File dir = new File(mDir);
+            if (!dir.exists()) {
+                dir.mkdirs();
+            }
+            String fileName = generateFileName();
+            File file = new File(dir, fileName);
+
+            mCurrentFilePath = file.getAbsolutePath();
+            mMediaRecorder = new MediaRecorder();
+            //设置输出文件
+            mMediaRecorder.setOutputFile(file.getAbsolutePath());
+            //设置MediaRecorder的音频源为麦克风
+            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
+            //设置音频的格式
+            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
+            //设置音频的编码为amr
+            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
+            //准备录音
+            mMediaRecorder.prepare();
+            //开始录音
+            mMediaRecorder.start();
+            //准备结束
+            isPrepared = true;
+            if (mListener != null) {
+                mListener.wellPrepared();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 随机生成文件的名称
+     *
+     * @return
+     */
+    private String generateFileName() {
+        return UUID.randomUUID().toString() + ".amr";
+    }
+
+    /**
+     * 获得音量等级
+     *
+     * @return
+     */
+    public int getVoiceLevel(int maxLevel) {
+        if (isPrepared) {
+            try {
+                //mMediaRecorder.getMaxAmplitude() 范围:1-32767之间
+                return maxLevel * mMediaRecorder.getMaxAmplitude() / 32768 + 1;
+            } catch (Exception e) {
+
+            }
+        }
+        return 1;
+    }
+
+    /**
+     * 释放
+     */
+    public void release() {
+//        mMediaRecorder.stop();
+        mMediaRecorder.release();
+        mMediaRecorder = null;
+    }
+
+    /**
+     * 取消
+     */
+    public void cancel() {
+        release();
+        //删除文件
+        if (mCurrentFilePath != null) {
+            File file = new File(mCurrentFilePath);
+            file.delete();
+            mCurrentFilePath = null;
+        }
+    }
+
+    /**
+     * 获取当前文件存储路径
+     *
+     * @return
+     */
+    public String getCurrentFilePath() {
+        return mCurrentFilePath;
+    }
+}