通知与服务——服务Service——推送服务到前台

Love The Way You Lie 2023-09-28 16:33 145阅读 0赞

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布局：

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代码：

package com.example.myapplication;
    
    import android.content.Intent;
    import android.os.Bundle;
    import android.text.TextUtils;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    public class MainActivity6 extends AppCompatActivity implements View.OnClickListener
    {
    
        private EditText et_song;
        private Button btn_send_service;
        private boolean isPlaying = true; // 是否正在播放
    
    
        @Override
        protected void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main6);
    
    
    
            et_song = findViewById(R.id.et_song);
            btn_send_service = findViewById(R.id.btn_send_service);
    
    
            btn_send_service.setOnClickListener(this);
        }
    
        @Override
        public void onClick(View v)
        {
            if (v.getId() == R.id.btn_send_service)
            {
                if (TextUtils.isEmpty(et_song.getText()))
                {
                    Toast.makeText(this, "请填写歌曲名称", Toast.LENGTH_SHORT).show();
                    return;
                }
    
                // 创建一个通往音乐服务的意图
                Intent intent = new Intent(this, MusicService.class);
    
                intent.putExtra("is_play", isPlaying); // 是否正在播放音乐
                intent.putExtra("song", et_song.getText().toString());
    
                btn_send_service.setText(isPlaying?"暂停播放音乐":"开始播放音乐");
    
                startService(intent); // 启动音乐播放服务
    
                isPlaying = !isPlaying;
            }
        }
    
    }

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MusicService

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