我在 3 个 imagebuttons(circle) 的帮助下制作了一个非常简单的 android 程序,现在我想要的是在单击该特定按钮后,它的背景图像应该被更改..我尝试了如下代码,但它不起作用: main。爪哇
package com.esp.therisemethod.ui;
import com.esp.therisemethod.R;
import com.esp.therisemethod.uc.Header;
import com.esp.therisemethod.uc.Menu;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
public class ProgressActivity extends Activity implements OnClickListener {
private ImageView resetall, undo, b1, b2, b3;
int cnt1,cnt2,cnt3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
b1 = (ImageView) findViewById(R.id.b1);
b2 = (ImageView) findViewById(R.id.b2);
b3 = (ImageView) findViewById(R.id.b3);
resetall = (ImageView) findViewById(R.id.reset_all);
undo = (ImageView) findViewById(R.id.undo);
setContentView(R.layout.activity_progress);
Header header =(Header)findViewById(R.id.header);
header = (Header) findViewById(R.id.header);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
b3.setOnClickListener(this);
header.btn_bak.setVisibility(View.VISIBLE);
header.btn_bak.setVisibility(View.VISIBLE);
Menu menu =(Menu)findViewById(R.id.prog_footer);
menu.setSelectedTab(1);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.b1:
cnt1++;
if(cnt1>1 && cnt1<=5)
{
b1.setBackgroundResource(R.drawable.circle_red);
}
else if (cnt1>=6 && cnt1<10) {
b1.setBackgroundResource(R.drawable.circle_orange);
}
else{
b1.setBackgroundResource(R.drawable.circle_green);
}
break;
case R.id.b2:
cnt2++;
if(cnt2<=5)
{
b2.setImageResource(R.drawable.circle_red);
}
else if (cnt2>=6 && cnt2<10) {
b2.setImageResource(R.drawable.circle_orange);
}
else{
b2.setImageResource(R.drawable.circle_green);
}
break;
case R.id.b3:
cnt3++;
if(cnt3<=5)
{
b2.setImageResource(R.drawable.circle_red);
}
else if (cnt3>=6 && cnt3<10) {
b2.setImageResource(R.drawable.circle_orange);
}
else{
b2.setImageResource(R.drawable.circle_green);
}
break;
case R.id.reset_all:
break;
case R.id.undo:
break;
}
}
}
主要的.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.esp.therisemethod.uc.Header
android:id="@+id/header"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:layout_below="@+id/header"
android:layout_above="@+id/prog_footer">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<LinearLayout
android:id="@+id/linearp1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/header"
android:orientation="vertical" >
<com.esp.therisemethod.uc.EspTextView
android:id="@+id/client_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:gravity="center"
android:tag="800"
android:text="Welcome Back SAM!"
android:textSize="25dp"
android:textStyle="bold" />
<com.esp.therisemethod.uc.EspTextView
android:id="@+id/make_choice"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:gravity="center"
android:tag="800"
android:text="Please make your choice:"
android:textSize="20dp" />
</LinearLayout>
<RelativeLayout
android:id="@+id/ralativep1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linearp1"
android:layout_centerVertical="true"
android:layout_marginTop="10dp" >
<ImageView
android:id="@+id/b1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="20dp"
android:src="@drawable/cir_grey1" />
<ImageView
android:id="@+id/b2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="20dp"
android:src="@drawable/cir_grey1" />
</RelativeLayout>
<ImageView
android:id="@+id/b3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/ralativep1"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:src="@drawable/cir_grey1" />
<LinearLayout
android:id="@+id/linear2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/b3"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="30dp"
android:weightSum="2" >
<Button
android:id="@+id/reset_all"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:background="@drawable/btn_med"
android:text="Reset all"
android:textColor="#ffffff" />
<Button
android:id="@+id/undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:background="@drawable/btn_med"
android:text="Undo"
android:textColor="#ffffff" />
</LinearLayout>
</LinearLayout>
</ScrollView>
<com.esp.therisemethod.uc.Menu
android:id="@+id/prog_footer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" />
</RelativeLayout>