问题描述
- 为何音乐播放器代码在esclipse中没报错，点击按钮却没有实现功能，上图上代码，求前辈们指教
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Mainactivity
package com.example.music;import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore.Audio.Media;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;public class MainActivity extends Activity implements OnClickListener {
List musiclists = new ArrayList();
List> list = new ArrayList>();
Button play_pause, stop, onplay, downplay, close, exit;
ActivityReceiver activityReceiver;
public static final String CTL_ACTION = "org.crazyit.action.CTL_ACTION";
public static final String UPDATE_ACTION = "org.crazyit.action.UPDATE_ACTION";
Intent intentservice;
// 定义音乐的播放状态 ，0X11 代表停止 ，0x12代表播放,0x13代表暂停
int status = 0x11;@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); UIinit(); logic(); musicList(); activityReceiver = new ActivityReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction(UPDATE_ACTION); registerReceiver(activityReceiver, filter); intentservice = new Intent(this, MusicService.class); startService(intentservice); } @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; } public void UIinit() { play_pause = (Button) this.findViewById(R.id.play_pause); stop = (Button) this.findViewById(R.id.stop); onplay = (Button) this.findViewById(R.id.onplay); close = (Button) this.findViewById(R.id.close); exit = (Button) this.findViewById(R.id.exit); downplay = (Button) this.findViewById(R.id.downplay); } public void logic() { play_pause.setOnClickListener(this); stop.setOnClickListener(this); onplay.setOnClickListener(this); downplay.setOnClickListener(this); close.setOnClickListener(this); exit.setOnClickListener(this); } @Override public void onClick(View source) { Intent intent = new Intent(CTL_ACTION); switch (source.getId()) { case R.id.play_pause: { intent.putExtra("control", 1); break; } case R.id.stop: { intent.putExtra("control", 2); break; } case R.id.onplay: { intent.putExtra("control", 3); break; } case R.id.downplay: { intent.putExtra("control", 4); break; } case R.id.close: { this.finish(); break; } case R.id.exit: { stopService(intentservice); this.finish(); break; } } sendBroadcast(intent); } public class ActivityReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // 获取Intent中的update消息，update代表播放状态 int update = intent.getIntExtra("update", -1); switch (update) { case 0x11: { play_pause.setText("播放"); status = 0x11; break; } // 控制系统进入播放状态 case 0x12: { // 播放状态下设置使用按钮 play_pause.setText("暂停"); // 设置当前状态 status = 0x12; break; } // 控制系统进入暂停状态 case 0x13: { play_pause.setText("播放"); status = 0x13; break; } } } } /* 播放列表 */ public void musicList() { // 取得指定位置的文件设置显示到播放列表 String[] music = new String[] { Media._ID, Media.DISPLAY_NAME, Media.TITLE, Media.DURATION, Media.ARTIST, Media.DATA }; Cursor cursor = getContentResolver().query(Media.EXTERNAL_CONTENT_URI, music, null, null, null); while (cursor.moveToNext()) { Music temp = new Music(); temp.setFilename(cursor.getString(1)); temp.setTitle(cursor.getString(2)); temp.setDuration(cursor.getInt(3)); temp.setArtist(cursor.getString(4)); temp.setData(cursor.getString(5)); musiclists.add(temp); Map<String, Object> map = new HashMap<String, Object>(); map.put("name", cursor.getString(1)); map.put("artist", cursor.getString(4)); list.add(map); } ListView listview = (ListView) findViewById(R.id.musics); SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.musicsshow, new String[] { "name", "artist" }, new int[] { R.id.name, R.id.artist }); listview.setAdapter(adapter); listview.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int current, long id) { Intent intent=new Intent(CTL_ACTION); intent.putExtra("control", 5); intent.putExtra("current", current); sendBroadcast(intent); } }); }}
TitanMusic.java
package com.example.titan;public class TitanMusic {
private String filename; private String Title; private int duration; private String artist; private String location; public String getFilename() { return filename; } public void setFilename(String filename) { this.filename = filename; } public String getTitle() { return Title; } public void setTitle(String title) { Title = title; } public int getDuration() { return duration; } public void setDuration(int duration) { this.duration = duration; } public String getArtist() { return artist; } public void setArtist(String artist) { this.artist = artist; } public String getData() { return location; } public void setData(String location) { this.location = location; }// {MediaStore.Audio.Media._ID, MediaStore.Audio.Media.DISPLAY_NAME,
// MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DURATION,
// MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.DATA
}
TitanMusicService.java
package com.example.titan;import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.IBinder;
import android.provider.MediaStore.Audio.Media;
import android.util.Log;public class TitanMusicService extends Service {
List musiclists = new ArrayList();
List> list = new ArrayList>();
MyReceiver serviceReceiver;
MediaPlayer mPlayer;
int status = 0x11;
//歌曲下标
int current = 0;
int count = 0;
int flog = 0;
//String filename;
@Override
public IBinder onBind(Intent arg0) {return null; } @Override public void onDestroy() { flog=0; mPlayer.stop(); mPlayer.release(); super.onDestroy(); } @Override public void onCreate() { flog=1; musicList(); count = list.size(); Log.e("Service", "onStart"); serviceReceiver = new MyReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction(MainActivity.CTL_ACTION); registerReceiver(serviceReceiver, filter); mPlayer = new MediaPlayer(); mPlayer.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { current++; if (current >= count) { current = 0; } String filename = ((TitanMusic) musiclists.get(current)).getData(); playMusic(filename); } }); super.onCreate(); } @Override public void onStart(Intent intent, int startId) { if(flog==2){ Intent sendIntent = new Intent(MainActivity.UPDATE_ACTION); sendIntent.putExtra("update", status); //sendIntent.putExtra("current", current); sendBroadcast(sendIntent); } flog=2; } private void playMusic(String path) { try { /* 重置MediaPlayer */ mPlayer.reset(); /* 设置要播放的文件的路径 */ mPlayer.setDataSource(path); /* 准备播放 */ mPlayer.prepare(); /* 开始播放 */ mPlayer.start(); mPlayer.setOnCompletionListener(new OnCompletionListener() { public void onCompletion(MediaPlayer arg0) { //播放完成一首之后进行下一首 current--; if (current < 0) { current = count; } playMusic( ((TitanMusic) musiclists.get(current)).getData()); status = 0x12; } }); }catch (IOException e){} } /* 播放列表 */ public void musicList() { // 取得指定位置的文件设置显示到播放列表 String[] music = new String[] { Media._ID, Media.DISPLAY_NAME, Media.TITLE, Media.DURATION, Media.ARTIST, Media.DATA }; Cursor cursor = getContentResolver().query(Media.EXTERNAL_CONTENT_URI, music, null, null, null); while (cursor.moveToNext()) { TitanMusic temp = new TitanMusic(); temp.setFilename(cursor.getString(1)); temp.setTitle(cursor.getString(2)); temp.setDuration(cursor.getInt(3)); temp.setArtist(cursor.getString(4)); temp.setData(cursor.getString(5)); musiclists.add(temp); Map<String, Object> map = new HashMap<String, Object>(); map.put("name", cursor.getString(1)); map.put("artist", cursor.getString(4)); list.add(map); } } public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { int control = intent.getIntExtra("control", -1); switch (control) { case 1: { // 如果原来处于停止的状态 if (status == 0x11) { playMusic( ((TitanMusic) musiclists.get(current)).getData()); status = 0x12; } // 原来处于播放状态 else if (status == 0x12) { mPlayer.pause(); status = 0x13; } // 原来处于暂停状态 else if (status == 0x13) { mPlayer.start(); status = 0x12; } break; } case 2: { // 如果原来正在播放或暂停 if (status == 0x12 || status == 0x13) { mPlayer.stop(); status = 0x11; } break; } case 3: { current--; if (current < 0) { current = count; } playMusic( ((TitanMusic) musiclists.get(current)).getData()); status = 0x12; break; } case 4: { current++; if (current > count) { current = 0; } playMusic( ((TitanMusic) musiclists.get(current)).getData()); status = 0x12; break; } case 5: { current = intent.getIntExtra("current", -1);; playMusic( ((TitanMusic) musiclists.get(current)).getData()); status = 0x12; break; } } Intent sendIntent = new Intent(MainActivity.UPDATE_ACTION); sendIntent.putExtra("update", status); // sendIntent.putExtra("current", current); sendBroadcast(sendIntent); } }}
布局代码：
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" ><LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/onplay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="上一首" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:orientation="horizontal" > <Button android:id="@+id/play_pause" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="播放" /> <Button android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止" /> </LinearLayout> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <Button android:id="@+id/downplay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:text="下一首" /> </RelativeLayout> </LinearLayout> <!-- <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="音乐列表" android:textColor="#ff0000ff" android:textSize="30sp" /> --> <ListView android:id="@+id/musics" android:layout_width="match_parent" android:layout_height="257dp" android:layout_weight="1.53" > </ListView> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <Button android:id="@+id/close" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="最小化" /> <Button android:id="@+id/exit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:text="退出" /> </RelativeLayout> </LinearLayout>歌曲布局：
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" ><TextView android:id="@+id/name" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20dp" /> <TextView android:id="@+id/artist" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20dp" />
解决方案
解决方案二：
求前辈们看一下啊啊啊啊啊啊啊啊啊，这是我们的作业啊
解决方案三：
报啥错了？弄个logcat 的图出来，可能是按钮事件出错了，你在仔细检查下按钮事件