If this is a dumb question then I apologize:
This is my first attempt at making an android app, and for some reason this will not start. It always closes as soon as I click on it Any thoughts on what might be going wrong? I’m lost.
package weight.Lifting.stuff;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View;
public class MainActivity extends Activity
{
TextView weight100, weight95, weight90, weight85, weight80, weight75, weight70, weight65, weight60;
EditText enterWeight, enterReps;
double Weight=1,Reps=1,a=1,b=1,c=1,d=1,e=1,f=1,g=1,h=1,i=1,A=.95,B=.90,C=.85,D=.80,E=.75,F=.70,G=.65,H=.60,I=.333;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity__lifting);
weight100 = (TextView) findViewById (R.id.textView3);
weight95 = (TextView) findViewById (R.id.textView8);
weight90 = (TextView) findViewById (R.id.textView9);
weight85 = (TextView) findViewById (R.id.textView10);
weight80 = (TextView) findViewById (R.id.textView11);
weight75 = (TextView) findViewById (R.id.textView12);
weight70 = (TextView) findViewById (R.id.textView15);
weight65 = (TextView) findViewById (R.id.textView16);
weight60 = (TextView) findViewById (R.id.textView17);
enterWeight = (EditText) findViewById (R.id.editText1);
enterReps = (EditText) findViewById (R.id.editText2);
}
public void onButton1Click (View v)
{
Weight = Double.parseDouble(enterWeight.getText().toString());
Reps = Double.parseDouble(enterReps.getText().toString());
a = ((Weight*I*Reps)+Weight);
b = ((Weight*I*Reps)+Weight)*A;
c = ((Weight*I*Reps)+Weight)*B;
d = ((Weight*I*Reps)+Weight)*C;
e = ((Weight*I*Reps)+Weight)*D;
f = ((Weight*I*Reps)+Weight)*E;
g = ((Weight*I*Reps)+Weight)*F;
h = ((Weight*I*Reps)+Weight)*G;
i = ((Weight*I*Reps)+Weight)*H;
weight100.setText(Double.toString(a));
weight95.setText(Double.toString(b));
weight90.setText(Double.toString(c));
weight85.setText(Double.toString(d));
weight80.setText(Double.toString(e));
weight75.setText(Double.toString(f));
weight70.setText(Double.toString(g));
weight65.setText(Double.toString(h));
weight60.setText(Double.toString(i));
}
}
heres my xml
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context=".MainActivity_Lifting" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Enter Weight:" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignRight="@+id/textView2"
android:layout_below="@+id/textView1"
android:ems="10" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText1"
android:text="Enter Reps:" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignRight="@+id/textView2"
android:layout_below="@+id/textView2"
android:ems="10" />
<Button
android:id="@+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText2"
android:focusableInTouchMode="true"
android:gravity="center_vertical|center_horizontal|left"
android:onClick="onButton1Click"
android:text="Calculate"
android:textSize="10sp" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/editText1"
android:layout_marginLeft="58dp"
android:layout_toRightOf="@+id/editText1"
android:text="95% (3 reps)" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editText2"
android:layout_alignLeft="@+id/textView4"
android:text="90% (5 reps)" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView5"
android:layout_alignTop="@+id/editText2"
android:text="85% (6 reps)" />
<TextView
android:id="@+id/textView100"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView4"
android:layout_alignRight="@+id/textView4"
android:text="100% (1 rep)" />
<TextView
android:id="@+id/textView14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView13"
android:layout_below="@+id/textView13"
android:text="70% (12 reps)" />
<TextView
android:id="@+id/textView18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView14"
android:layout_below="@+id/textView14"
android:text="65% (15 reps)" />
<TextView
android:id="@+id/textView19"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView100"
android:layout_below="@+id/textView18"
android:text="60% (20 reps)" />
<TextView
android:id="@+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView7"
android:layout_below="@+id/editText2"
android:text="75% (10 reps)" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView100"
android:layout_below="@+id/textView6"
android:text="80% (8 reps)" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView100"
android:layout_alignBottom="@+id/textView100"
android:layout_toRightOf="@+id/textView7"
android:text="TextView" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView3"
android:layout_toRightOf="@+id/textView4"
android:text="TextView" />
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/textView3"
android:layout_below="@+id/textView4"
android:text="TextView" />
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView6"
android:layout_alignBottom="@+id/textView6"
android:layout_alignLeft="@+id/textView8"
android:text="TextView" />
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView6"
android:layout_toRightOf="@+id/textView7"
android:clickable="true"
android:focusable="true"
android:focusableInTouchMode="true"
android:text="TextView" />
<TextView
android:id="@+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView11"
android:layout_toRightOf="@+id/textView13"
android:text="TextView" />
<TextView
android:id="@+id/textView15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView12"
android:layout_below="@+id/textView13"
android:text="TextView" />
<TextView
android:id="@+id/textView16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView18"
android:layout_alignBottom="@+id/textView18"
android:layout_alignLeft="@+id/textView15"
android:text="TextView" />
<TextView
android:id="@+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView19"
android:layout_alignBottom="@+id/textView19"
android:layout_alignLeft="@+id/textView16"
android:text="TextView" />
</RelativeLayout>
edit added manifest xml and log cat
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="weight.Lifting.stuff"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" android:debuggable="true">
<activity
android:name="weight.Lifting.stuff.MainActivity_Lifting"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
LogCat output:
02-01 01:49:15.962: W/Trace(785): Unexpected value from nativeGetEnabledTags: 0
02-01 01:49:15.962: W/Trace(785): Unexpected value from nativeGetEnabledTags: 0
02-01 01:49:15.983: W/dalvikvm(785): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
02-01 01:49:16.003: E/AndroidRuntime(785): FATAL EXCEPTION: main
02-01 01:49:16.003: E/AndroidRuntime(785): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{weight.Lifting.stuff/weight.Lifting.stuff.MainActivity_Lifting}: java.lang.ClassNotFoundException: Didn't find class "weight.Lifting.stuff.MainActivity_Lifting" on path: /data/app/weight.Lifting.stuff-1.apk
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread.access$600(ActivityThread.java:141)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.os.Handler.dispatchMessage(Handler.java:99)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.os.Looper.loop(Looper.java:137)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-01 01:49:16.003: E/AndroidRuntime(785): at java.lang.reflect.Method.invokeNative(Native Method)
02-01 01:49:16.003: E/AndroidRuntime(785): at java.lang.reflect.Method.invoke(Method.java:511)
02-01 01:49:16.003: E/AndroidRuntime(785): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-01 01:49:16.003: E/AndroidRuntime(785): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-01 01:49:16.003: E/AndroidRuntime(785): at dalvik.system.NativeStart.main(Native Method)
02-01 01:49:16.003: E/AndroidRuntime(785): Caused by: java.lang.ClassNotFoundException: Didn't find class "weight.Lifting.stuff.MainActivity_Lifting" on path: /data/app/weight.Lifting.stuff-1.apk
02-01 01:49:16.003: E/AndroidRuntime(785): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
02-01 01:49:16.003: E/AndroidRuntime(785): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
02-01 01:49:16.003: E/AndroidRuntime(785): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
02-01 01:49:16.003: E/AndroidRuntime(785): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
I recreated your project, it compiles and runs with no issues. Check your AndroidManifest.xml for problems. Consider posting that along with your LogCat output.