实际上我是编程新手,但我尝试过这个简单的数学游戏。在这个程序中,我制作了s1,s2,s3,s4& s5动态生成..但只有s1,s2正在改变,s3,s4,s5如果方法再次调用则不会改变...请帮帮我。
public class MainActivity extends Activity implements OnClickListener {
Button b1, b2, b3;
ImageView i, i2, i3;
TextView t1, t2, t3;
String s1, s2, s3, s4, s5;
int m, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, n[];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button) findViewById(R.id.button1);
b2 = (Button) findViewById(R.id.button2);
b3 = (Button) findViewById(R.id.button3);
i = (ImageView) findViewById(R.id.imageView1);
t1 = (TextView) findViewById(R.id.textView1);
t2 = (TextView) findViewById(R.id.textView2);
t3 = (TextView) findViewById(R.id.textView3);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
b3.setOnClickListener(this);
imp();
}
public void imp() {
Random r1 = new Random();
r2 = r1.nextInt(15) + 1;
r3 = r1.nextInt(15) + 1;
r4 = r2 + r3;
r5 = r2 - r3;
r6 = r2 * r3;
n = new int[] { r4, r5, r6 };
while (r9 == r11 || r9 == r13 || r11 == r13) {
r8 = r1.nextInt(3) + 0;
r9 = n[r8];
r10 = r1.nextInt(3) + 0;
r11 = n[r10];
r12 = r1.nextInt(3) + 0;
r13 = n[r12];
}
s1 = Integer.toString(r2);
s2 = Integer.toString(r3);
s3 = Integer.toString(r9);
s4 = Integer.toString(r11);
s5 = Integer.toString(r13);
t1.setText(s1);
t2.setText(s2);
b1.setText(s3);
b2.setText(s4);
b3.setText(s5);
int[] images = { R.drawable.plus, R.drawable.minus, R.drawable.multiply };
Random random = new Random();
m = images[random.nextInt(images.length)];
i.setImageResource(m);
}
public void click(int k, Button b) {
if (m == R.drawable.plus && k == r4 || m == R.drawable.minus && k == r5
|| m == R.drawable.multiply && k == r6) {
imp();
} else {
t3.setText("FINISH");
t3.setVisibility(View.VISIBLE);
b.setPressed(true);
b1.setClickable(false);
b2.setClickable(false);
b3.setClickable(false);
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
click(r9, b1);
break;
case R.id.button2:
click(r11, b2);
break;
case R.id.button3:
click(r13, b3);
break;
}
}
}
,布局是
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal|center_vertical"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="46dp"
android:layout_weight="0.97"
android:editable="false"
android:text="Large Text"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ImageView
android:layout_weight="1"
android:id="@+id/imageView1"
android:layout_width="67dp"
android:layout_height="29dp"
android:src="@drawable/plus" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1.00"
android:text="Large Text"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:paddingTop="50dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:layout_weight="1"
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:layout_weight="1"
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:layout_weight="1"
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="50dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="50dp"
android:visibility="invisible"/>
</LinearLayout>
答案 0 :(得分:1)
查看你的while循环,第二次运行该方法时,条件不可能是真的,因为记住了上一次的结果。我建议使用局部变量而不是字段来表示这些答案。您可以通过将r9,r11和r13中的每一个设置为0来继续使用字段;然而,他们没有充分理由成为田地。在设置按钮文本之前,您只需要这些变量。现在,对于局部变量,您需要将它们初始化为0,默认情况下它们没有像字段那样的值。
如果您不介意我提供一些未经请求的建议,我建议您使用稍微更具描述性的变量名称。例如:
while (result1 == result2 || result1 == result3 || result2 == result3) {
randomIndex1 = random.nextInt(3) + 0;
result1 = resultArray[randomIndex1];
randomIndex2 = random.nextInt(3) + 0;
result2 = resultArray[randomIndex2];
randomIndex3 = random.nextInt(3) + 0;
result3 = resultArray[randomIndex3];
}
这使得代码对其他人来说更容易理解。 (并为将来自己!)