[英]How can I increment the variable more than one time when sensor event changed?
正如你所看到的,當加速度計 z 軸值大於 12 時,我試圖增加變量“c”。但我可以一次這樣做,它會在執行程序后將值 0 更改為 1。 但我想收集 z 軸值超過 12 的次數。
@Override
public void onSensorChanged (SensorEvent event) {
textView.setText(event.values[0] + "");
textView1.setText(event.values[1] + "");
textView2.setText(event.values[2] + "");
String s = new String();
s = textView2.getText().toString().trim();
Float t = Float.parseFloat(s);
int c = 0;
if (t > 11) {
c++;
txt.setText(Integer.toString(c));
}
}
int counter = 0;
@Override
public void onSensorChanged (SensorEvent event) {
textView.setText(event.values[0] + "");
textView1.setText(event.values[1] + "");
textView2.setText(event.values[2] + "");
String s = new String();
s = textView2.getText().toString().trim();
Float t = Float.parseFloat(s);
int c = 0; // ???
if (t > 11) {
c++;
counter++;
txt.setText(Integer.toString(c));
System.out.println("I need to learn how to use global
variables.\n
also the thing has been greater than \"12\"
"+counter" times."
);
}
}
另外,也許使用“textView#”以外的更有意義的變量名會讓人們更容易弄清楚你想要做什么。
您可以將變量 c 定義為字段成員,如下所示:
public class MainActivity {
private int c = 0;
(...)
@Override
public void onSensorChanged (SensorEvent event) {
textView.setText(event.values[0] + "");
textView1.setText(event.values[1] + "");
textView2.setText(event.values[2] + "");
String s = new String();
s = textView2.getText().toString().trim();
Float t = Float.parseFloat(s);
if (t > 11) {
c++;
txt.setText(Integer.toString(c));
}
}
}
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