I was trying to run my project in my Genymotion emulator, but none of the new updated buttons that I added were showing when I ran my Android application. So, I made a copy of my project to run a "clean" on it because I've had problems with my R.java file not being generated after cleaning it, and I was right as the R.java file didn't generate in the copied project. I'm almost sure it's a problem in my XML file, but my XML file shows no errors.
I also had the same error before, which I posted about here: R cannot be resolved to a variable?
The R file is not being generated so all my calls in MainActivity like mBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.crayon); are stating "R cannot be resolved to a variable" which I know points to a problem in my XML file.
Here is my activity_main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:gravity="center"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal|fill_horizontal|center"
android:orientation="horizontal" >
<RadioGroup
android:id="@+id/greyorcolor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/grey"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/reyscale" />
<RadioButton
android:id="@+id/color"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/color" />
</RadioGroup>
<RadioGroup
android:id="@+id/smallorlarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/large"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/large" />
<RadioButton
android:id="@+id/small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/small" />
</RadioGroup>
</LinearLayout>
<edu.berkeley.cs160.opalkale.prog2.DrawingView
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:orientation="vertical"
android:src="@drawable/ic_launcher" />
</LinearLayout>
My strings.xml file:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Drawing</string>
<string name="greyscale">Greyscale</string>
<string name="color">Color</string>
<string name="small">Small Brush</string>
<string name="large">Large Brush</string>
<string name="hello_world">Hello world!</string> </resources>
My MainActivity.java file:
package edu.berkeley.cs160.opalkale.prog2;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bitmap munBitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.crayon);
Bitmap mBitmap = munBitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(mBitmap);
DrawingView drawingView = (DrawingView) findViewById(R.id.drawing);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Problems window:
enter code here
