Intent 中的网格视图位置没有增加

Question

我正在设置网格视图画廊，并在意图 id 中，我需要增加 int 位置以显示画廊中的下一张照片，但不会增加，这是代码：

公共类 FullScreenActivity 扩展 AppCompatActivity {

private ImageView imageView;

private ImageButton BtnNext, BtnBefore, BtnShare, BtnDownload;

private int position;

private ImageAdapter imageAdapter;

@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_full_screen);

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

    BtnNext = (ImageButton) findViewById(R.id.imgBtnNext);

    BtnBefore = (ImageButton) findViewById(R.id.imgBtnBefore);

    BtnShare = (ImageButton) findViewById(R.id.imgBtnShare);

    BtnDownload = (ImageButton) findViewById(R.id.imgBtnDownload);

    Intent intent = getIntent();

    position = intent.getExtras().getInt("id");

    imageAdapter = new ImageAdapter(this);

    imageView.setImageResource(imageAdapter.ImagesArray[position]);

    BtnNext.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

            imageView.setImageResource(imageAdapter.ImagesArray[position + 1]);

            Toast.makeText(FullScreenActivity.this, "position: " + position, Toast.LENGTH_SHORT).show();

        }

    });

    BtnBefore.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

        }

    });

    BtnShare.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

        }

    });

    BtnDownload.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

        }

    });

}

}

Answer 1

您不是在跟踪位置值，只是编写代码位置 + 1，您的实际代码应该是这样的：BtnNext.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            position = position + 1;            imageView.setImageResource(imageAdapter.ImagesArray[position]);            Toast.makeText(FullScreenActivity.this, "position: " + position, Toast.LENGTH_SHORT).show();        }    }); //note you should also write the code to check if the position exceeds the final value