音乐播放器（1）

墨蓝 2022-06-10 12:23 377阅读 0赞

MainActivity

package com.sugesi.musicplayer;
    
    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.MenuInflater;
    import android.view.MenuItem;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
    
    //menu
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            MenuInflater inflater = new MenuInflater(this);
            inflater.inflate(R.menu.activity_main,menu);
    
            return super.onCreateOptionsMenu(menu);
        }
    
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            if (item.getItemId()== R.id.item_setting) {
                Intent intent = new Intent(this, SettingActivity.class);
                startActivity(intent);
                //启动一个设置界面
            } else if (item.getItemId()==R.id.item_exit){
    
    
            }
            return super.onOptionsItemSelected(item);
        }
    }

MusicPlayerService

package com.sugesi.musicplayer;
    
    import android.app.Service;
    import android.content.Intent;
    import android.os.IBinder;
    
    public class MusicPlayerService extends Service {
        public MusicPlayerService() {
        }
    
        @Override
        public void onCreate() {
            System.out.println("服务停止");
            super.onCreate();
        }
    
        @Override
        public IBinder onBind(Intent intent) {
    
            return null;//一定要加？？？？？？？？？？？？？？？？？？？？
        }
    
        @Override
        public void onDestroy() {
            System.out.println("服务停止");
    
            super.onDestroy();
        }
    }

SettingActivity

public class SettingActivity extends AppCompatActivity {
    
        private static final int CYCLE = 1;
        private static final int NEXT = 2;
        private static final int STOP = 3;
        private RadioGroup rg_mode;
        private SharedPreferences sp;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_setting);
            rg_mode = (RadioGroup) findViewById(R.id.rg_mode);
            //返回sp
            sp = getSharedPreferences("config", MODE_PRIVATE);
    
            int mode=sp.getInt("mode",0);
         RadioButton rb;
            switch (mode) {
                case CYCLE:
                    rb = (RadioButton) findViewById(R.id.rb_cycle);
                    rb.setChecked(true);//???????????????????????????????????????????????
                    break;
    
                case NEXT:
                    rb = (RadioButton) findViewById(R.id.rb_Next);
                    rb.setChecked(true);
                    break;
    
                case STOP:
                    rb = (RadioButton) findViewById(R.id.rb_stop);
                    rb.setChecked(true);
                    break;
    
                default:
                    break;
            }
    
    
            rg_mode.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup Group, @IdRes int checkedId) {
                    SharedPreferences.Editor editor = sp.edit();
                    switch (checkedId) {
                            case R.id.rb_cycle:
                                editor.putInt("mode",CYCLE);
    
                                break;
                            case R.id.rb_Next:
                                editor.putInt("mode",NEXT);
    
                                break;
                            case R.id.rb_stop:
                                editor.putInt("mode",STOP);
                                break;
    
                            default:
                                break;
                        }
                }
            });
        }
    }