Java Android 相机

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我有这个简单的相机 Intent 应用程序，但我想知道如何向其添加滤镜。我是 Java 初学者，我按照指南使相机工作。任何人都可以帮助我了解如何使用按钮 onClick Activity 添加过滤器吗？

public class MainActivity extends Activity {


private static String logtag = "CameraApp";

private static int TAKE_PICTURE = 1;

private Uri imageUri;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    Button cameraButton = (Button)findViewById(R.id.button_camera);

    cameraButton.setOnClickListener(cameraListener);
}


private OnClickListener cameraListener = new OnClickListener() {
    public void onClick(View v) {

        takePhoto(v);
    }
};

public void takePhoto(View v) {

    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");

    File photo = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "pic.jpg");

    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));

    imageUri = Uri.fromFile(photo);

    startActivityForResult(intent, TAKE_PICTURE);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode) {

        if(resultCode == Activity.RESULT_OK) {

            Uri selectedImage = imageUri;

            getContentResolver().notifyChange(selectedImage, null);

            ImageView imageView = (ImageView)findViewById(R.id.image_view_camera);

            ContentResolver cr = getContentResolver();

            Bitmap bitmap;
            try {

                bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, selectedImage);

                imageView.setImageBitmap(bitmap);

                Toast.makeText(MainActivity.this, selectedImage.toString(), Toast.LENGTH_LONG).show();
            } catch(Exception e) {

                Toast.makeText(MainActivity.this, "failed to load", Toast.LENGTH_LONG).show();
                Log.e(logtag, e.toString());
              }
          }
        }
    }

 }

Answer 1

你实现这样的效果:

Camera.Parameters parameters = camera.getParameters();
parameters.setColorEffect(Camera.Parameters.EFFECT_AQUA);
camera.setParameters(parameters);

文档:

http://developer.android.com/reference/android/hardware/Camera.Parameters.html#EFFECT_AQUA

Update:

 Button filterbutton;  
Button filterbutton = (Button)findViewById(R.id.filterbutton); }

       filterbutton.setOnClickListener(new View.OnClickListener() { 


             public void onClick(View v) { 

   v.setColorEffect(Camera.Parameters.EFFECT_AQUA); 
}