Question

我想使用默认视频录制意图ACTION_VIDEO_CAPTURE

来录制处于静音状态的视频

我正在尝试遵循以下代码以实现静音目的，但是它不起作用

private void setMicMuted(boolean state){
    AudioManager myAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE);

    // get the working mode and keep it
    int workingAudioMode = myAudioManager.getMode();

    myAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

    // change mic state only if needed
    if (myAudioManager.isMicrophoneMute() != state) {
        myAudioManager.setMicrophoneMute(state);
    }

    // set back the original working mode
    myAudioManager.setMode(workingAudioMode);
}

对此有任何想法或任何可用的第三方库或演示吗？

或我有第二种选择，例如在录制视频后删除声音，例如快速聊天。有没有可能？还是我可以实现相同的功能，例如快速聊天？

请帮助

Answer 1

此代码有效，但是您能告诉我您在主要活动中针对布尔状态发送的内容吗？

 private void setMicMuted(Boolean state){
//        AudioManager myAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
        AudioManager myAudioManager = (AudioManager)getApplicationContext().getSystemService(Context.AUDIO_SERVICE);
        // get the working mode and keep it
        int workingAudioMode = myAudioManager.getMode();

        myAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

        // change mic state only if needed
        if (myAudioManager.isMicrophoneMute() != state) {
            myAudioManager.setMicrophoneMute(state);
        }

        // set back the original working mode
        myAudioManager.setMode(workingAudioMode);
    }

这是您的代码兄弟...

Answer 2

必须具有“ MODIFY_AUDIO_SETTINGS”权限才能更改音频设置。因此，请先在清单文件中声明以下权限：

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

您的代码也可以正常工作，并且可以使用默认的视频捕获意图来录制无声音的视频，但是我仍然在下面发布整个活动代码：

import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Button btnRecord;
    int REQUEST_CODE_TAKE_VIDEO = 201;
    private final int MY_PERMISSIONS_REQUEST_FOR_VIDEO = 202;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video);
        btnRecord = findViewById(R.id.btnRecord);
        btnRecord.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {

                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED
                                && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
                            && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED
                            && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
                            && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {

                        ActivityCompat.requestPermissions(MainActivity.this,
                                new String[]{android.Manifest.permission.RECORD_AUDIO,
                                        android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
                                        android.Manifest.permission.READ_PHONE_STATE,
                                        android.Manifest.permission.READ_EXTERNAL_STORAGE,
                                        Manifest.permission.CAMERA
                                },
                                MY_PERMISSIONS_REQUEST_FOR_VIDEO);

                    } else {
                        takeVideo();
                    }

                } else {
                    takeVideo();
                }
            }
        });
    }


    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_FOR_VIDEO: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    takeVideo();

                } else {

                    Toast.makeText(MainActivity.this, "Permissions Declined! Can't record video withon permissions. ", Toast.LENGTH_SHORT).show();
                }
                return;
            }

        }
    }


    private void takeVideo() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
        intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, 3000);
        startActivityForResult(intent, REQUEST_CODE_TAKE_VIDEO);
        setMicMuted(true);
    }

    private void setMicMuted(Boolean state){
//        AudioManager myAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
        AudioManager myAudioManager = (AudioManager)getApplicationContext().getSystemService(Context.AUDIO_SERVICE);
        // get the working mode and keep it
        int workingAudioMode = myAudioManager.getMode();

        myAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

        // change mic state only if needed
        if (myAudioManager.isMicrophoneMute() != state) {
            myAudioManager.setMicrophoneMute(state);
        }

        // set back the original working mode
        myAudioManager.setMode(workingAudioMode);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        try{
            if (requestCode == REQUEST_CODE_TAKE_VIDEO) {
                if (resultCode == RESULT_OK) {
                    Uri videoUri = data.getData();
                    Toast.makeText(this, "Video saved to:\n" +
                            videoUri, Toast.LENGTH_LONG).show();
                } else if (resultCode == RESULT_CANCELED) {
                    Toast.makeText(this, "Video recording cancelled.",
                            Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(this, "Failed to record video",
                            Toast.LENGTH_LONG).show();
                }
            }
        }catch (Exception e){
            Log.e("Unexpected error", "@video recording " + e.toString());
        }

    }

}

以默认视频意图ACTION_VIDEO_CAPTURE录制不录制声音的视频，或者在录制视频后删除声音，例如快速聊天

2 个答案: