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;@Overrideprotected 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