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我想顯示一個textView對應的按鈕和圖像知道圖像是隨機的。例如,當顯示紅色圖像並單擊按鈕btn1
時,將顯示textView。如何顯示對應於隨機圖像的textView?
我試過這段代碼,但textView仍然不可見。
public class colors extends AppCompatActivity {
Button btn1, btn2, btn4;
ImageView img;
TextView txt1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_colors);
img = (ImageView) findViewById(R.id.imageView3);
txt1 = (TextView) findViewById(R.id.txt);
btn1 = (Button) findViewById(R.id.red);
btn2 = (Button) findViewById(R.id.blue);
btn4 = (Button) findViewById(R.id.green); //st.setEnabled(false);
int[] cards = {R.drawable.green, R.drawable.red, R.drawable.blue};
Random r = new Random();
final int n = r.nextInt(3);
img.setImageResource(cards[n]);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (n == 2) {
txt1.setVisibility(View.VISIBLE);
}
}
});
}
您隨機化n值'final int n = r.nextInt(3)'。因此,只有當n ramdmomly是2時,textView纔會變得可見 – joao86
是的,當n = 2時,將顯示thrR.drawable.red ---->將顯示texView,但在我的情況下,textView仍然不可見 – clara
僅當您單擊btn1和n == 2時,txt1上方纔會顯示。如果你有更多的代碼,你必須顯示它 – joao86