任何想法,为什么此代码无法正常工作?Android Studio onClickListener什么都不做
package com.example.hans.app.Activitys;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.support.v7.widget.AppCompatButton;
import android.widget.Button;
import android.widget.Toast;
import com.example.hans.app.R;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
Button homebutton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initalize
homebutton = (Button) findViewById(R.id.homebutton);
homebutton.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.homebutton:
Toast.makeText(getApplicationContext(), "test", Toast.LENGTH_LONG).show();
break;
}
}
编辑:activity_main.xml中代码:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.hans.app.Activitys.MainActivity"
tools:background="?attr/colorButtonNormal">
<Button
android:id="@+id/homebutton"
android:background="@drawable/houseempty"
android:elevation="0dp"
android:visibility="visible"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
style="@style/Widget.AppCompat.Button" />
</RelativeLayout>
我的Android试了一下:单击属性也是如此,我得到一个例外。这里什么都没发生。我慢慢变得疯狂-.-
我不能发布任何异常,因为也不例外^^
尝试Toast.makeText(v.getContext(),“test”,Toast.LENGTH_SHORT).show(); –
你有没有调试'onClick'方法? –
@aksacha是的,但它没有进入此代码 – HansKrywaa