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在這種方法中,我返回Double類型的值,但有一個錯誤說「方法返回Double類型的值時出錯?
必須返回Double類型的值」???
代碼:
public class Gyro extends Activity {
Double gyro_X;
Double gyro_Y;
Double gyro_Z;
public Double getGyro_X() {
if (this.gyro_X == null) {
Toast.makeText(this, ""+gyro_XIsNullText, ToastdurationShort).show();
} else {
return this.gyro_X;
}
}
它是一個類變量 – Androelpha 2012-04-11 08:37:06