我正在設置網格視圖畫廊，并在意圖 id 中，我需要增加 int 位置以顯示畫廊中的下一張照片，但不會增加，這是代碼：公共類 FullScreenActivity 擴展 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) { } });}}
1 回答
LEATH
TA貢獻1936條經驗 獲得超7個贊
您不是在跟蹤位置值，只是編寫代碼位置 + 1，您的實際代碼應該是這樣的：
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
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