如何从自定义相机视图/ UI保存图像

如何解决如何从自定义相机视图/ UI保存图像

我正在开发一个应用程序，它将照片从相机保存到文件夹（可以是任何文件夹），但是如果将其保存到图片文件夹，则可能是最好的选择。我已经取得了一些不错的进步，设计了用户界面，让我的相机可以显示。但是我遇到的问题是保存相机中的照片。

我的代码

cameraActivity.java

*

public class cameraActivity extends AppCompatActivity {
Camera camera;
    FrameLayout frameLayout;
    ShowCamera showCamera;
    Button cameraBTn;
    final static int PERMISSION_GRANTED = 1010;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        VerifyPermissions();
        frameLayout = findViewById(R.id.cameraview);
        cameraBTn = findViewById(R.id.cameraBTN);
        cameraBTn.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            }
        });
    }
    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
    }
    private void VerifyPermissions()
    {
        String[] permission = {Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.CAMERA};
        if(ContextCompat.checkSelfPermission(this.getApplicationContext(),permission[0]) == PackageManager.PERMISSION_GRANTED &&
                ContextCompat.checkSelfPermission(this.getApplicationContext(),permission[1]) == PackageManager.PERMISSION_GRANTED)
        {
        }
        else
        {
            ActivityCompat.requestPermissions(this,permission,PERMISSION_GRANTED);
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode,@NonNull String[] permissions,@NonNull int[] grantResults) {
        if(requestCode == PERMISSION_GRANTED)
        {
            System.out.println("GRANTED");
            camera = Camera.open();
            showCamera = new ShowCamera(this,camera);
            frameLayout.addView(showCamera);
        }
    }
}

在ui中显示我的相机的我的持有人类

    public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {

    Camera camera;
    SurfaceHolder holder;

    public ShowCamera(Context context,Camera camera) {
        super(context);
        this.camera = camera;
        holder = getHolder();
        holder.addCallback(this);


    }

    @Override
    public void surfaceCreated(@NonNull SurfaceHolder surfaceHolder) {
        Camera.Parameters parameters = camera.getParameters();

        // change camera orientation


        List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
        Camera.Size mSize = null;

        for(Camera.Size size : sizes)
        {
            mSize = size;
        }




        if(this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE)
        {
            parameters.set("orientation","portrait");
            camera.setdisplayOrientation(90);
            parameters.setRotation(90);

        }
        else
        {
            parameters.set("orientation","landscape");
            camera.setdisplayOrientation(0);
            parameters.setRotation(0);
        }

        camera.setParameters(parameters);
        parameters.setPictureSize(mSize.width,mSize.height);
        try {
            camera.setPreviewdisplay(holder);
            camera.startPreview();
        } catch (IOException e) {
            e.printstacktrace();
        }
    }

    @Override
    public void surfaceChanged(@NonNull SurfaceHolder surfaceHolder,int i,int i1,int i2) {

    }

    @Override
    public void surfaceDestroyed(@NonNull SurfaceHolder surfaceHolder) {
camera.stopPreview();
camera.release();
    }
}

Android清单

   <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.capstone.assignment2camera">

    <uses-feature
        android:name="android.hardware.Camera"
        android:required="true" />


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

    <uses-feature
        android:name="android.hardware.Camera"
        android:required="true" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".cameraActivity"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:label="@string/app_name"
            android:theme="@style/FullscreenTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="com.capstone.assignment2camera.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <Meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_path"></Meta-data>
        </provider>
    </application>

</manifest>

我的应用的用户界面

    <?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#0099cc"
    tools:context=".cameraActivity">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:id="@+id/cameraBTN"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Snap!"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.498"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.8" />

        <FrameLayout
            android:id="@+id/cameraview"
            android:layout_width="360dp"
            android:layout_height="506dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.49"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.12">

        </FrameLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>

有人知道我该如何保存相机拍摄的照片吗？