我的应用程序中有很多图像按钮。获取点击图像按钮的ID
目前我使用.getID()作为我游戏的另一种方法。我也想亲自看看这个Id。
我试图将ID分配给该按钮内的文本视图中单击这个样子,
clicker = new OnClickListener(){
@Override
public void onClick(View v){
ImageButton clicked = (ImageButton) v;
makeMove(clicked.getId()); // getting the id of where the person has clicked, and calling makeMove method which is defined below
TextView clickID = (TextView) findViewById(R.id.clickId);
clickID.setVisibility(View.VISIBLE);
clickID.setText(clicked.getId());
}
};
,但我得到了一个空指针,
clicked.getId();
是否有另一种方式来获得此信息?
也是我指派它错了吗?
我对android很陌生,不知道该在哪里转。任何帮助将非常感激。
谢谢。
而且我的日志猫,
02-12 18:23:27.379: E/AndroidRuntime(1042): FATAL EXCEPTION: main
02-12 18:23:27.379: E/AndroidRuntime(1042): java.lang.NullPointerException
02-12 18:23:27.379: E/AndroidRuntime(1042): at com.example.con4.ConnectFourActivity1$2.onClick(ConnectFourActivity1.java:178)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.view.View.performClick(View.java:4240)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.view.View$PerformClick.run(View.java:17721)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.os.Handler.handleCallback(Handler.java:730)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.os.Handler.dispatchMessage(Handler.java:92)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.os.Looper.loop(Looper.java:137)
02-12 18:23:27.379: E/AndroidRuntime(1042): at android.app.ActivityThread.main(ActivityThread.java:5103)
02-12 18:23:27.379: E/AndroidRuntime(1042): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 18:23:27.379: E/AndroidRuntime(1042): at java.lang.reflect.Method.invoke(Method.java:525)
02-12 18:23:27.379: E/AndroidRuntime(1042): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
02-12 18:23:27.379: E/AndroidRuntime(1042): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-12 18:23:27.379: E/AndroidRuntime(1042): at dalvik.system.NativeStart.main(Native Method)
你确定了'NullPointerException'来自行'clicked.getId()'? “ConnectFourActivity1.java”第178行究竟是什么? – TactMayers