Question

我正在尝试创建一个按钮，允许我通过服务录制音频，我希望按钮有文字："Start Recording"。在OnClick事件中，我希望按钮文本更改为："Stop Recording"。

我有这个代码在类中工作，但现在它不能在服务中工作，但是，因为我希望音频记录作为服务工作，我似乎无法更改按钮的文本。我对编码很新，所以任何帮助都将不胜感激！

我的代码如下：

上课：

public class Test extends AppCompatActivity {       

    public void Record(View view) {
        Intent intent = new Intent(this, RecordService.class);
        startService(intent);
    }    

    public void Play(View view) {
        Intent intent = new Intent(this, RecordService.class);
        stopService(intent);    
    }
}

服务

import android.app.Service;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.IBinder;
import android.widget.Button;
import android.view.View;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class RecordService extends Service {

    MediaRecorder mRecorder;
    public static String audioFilePath;
    public boolean isRecording = false;

    public RecordService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    public void onCreate () {

        if(mRecorder == null){

            SimpleDateFormat s = new SimpleDateFormat("ddMMyyyy_hhmmss");
            String format = s.format(new Date());

            audioFilePath = Environment.getExternalStorageDirectory().
                    getAbsolutePath() +  "/" + format + ".3gpp";

            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mRecorder.setOutputFile(audioFilePath);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        }

        if (isRecording) {
            try{
                stopRecording();
                isRecording = false;
                ((Button)view).setText("Start Recording");
            }catch(Exception e){
                e.printStackTrace();
            }
        } else {
            try{
                startRecording();
                isRecording = true;
                ((Button)view).setText("Stop Recording");
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }

    public void startRecording() throws IllegalStateException, IOException{
        mRecorder.prepare();
        mRecorder.start();
    }

    public void stopRecording() throws IllegalStateException, IOException{
        mRecorder.stop();
        mRecorder.release();
    }


    public void onStartCommand()
    {
        SimpleDateFormat s = new SimpleDateFormat("ddMMyyyy_hhmmss");
        String format = s.format(new Date());

        audioFilePath = Environment.getExternalStorageDirectory().
                getAbsolutePath() +  "/" + format + ".3gpp";

        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mRecorder.setOutputFile(audioFilePath);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        try {
            mRecorder.prepare();
        } catch (IOException e) {
            e.printStackTrace();
        }
        mRecorder.start();

    }

    public void onDestroy()
    {
       super.onDestroy();
        mRecorder.stop();
        mRecorder.release();

    }


}

活动：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="kyr.com.knowyourrights.Test">

    <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:text="Record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/RecordButton"
        android:layout_alignParentTop="true"
        android:onClick="Record">
    </Button>

</RelativeLayout>

Answer 1

您想要在服务中调用按钮，尝试使用BroadcastReceiver

Answer 2

在您的活动中将您的按钮声明为静态，例如

Disabled

然后在你想要的服务中做这样的事情

public static Button recordButton;
public void onCreate(Bundle savedInstanceState) {
   ....
   recordButton =(Button) findViewById(R.id.RecordButton);
   ....
}

（（按钮）视图）服务内部无法正常工作

2 个答案: