Simple Math Stuff
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AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tk.d3xt3r01.medie"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:windowSoftInputMode="stateVisible"
android:name="tk.d3xt3r01.medie.MainActivity"
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>strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="calculeaza">Calculeaza</string>
<string name="teza">Teza</string>
<string name="note">Note</string>
<string name="app_name">Medie</string>
<string name="reset">Reset</string>
<string name="suma" />
<string name="mediaaritmetica" />
<string name="mediaponderata" />
</resources>main.xml
<RelativeLayout 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: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=".MainActivity" >
<Button
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/calc"
android:layout_alignBottom="@+id/calc"
android:layout_alignRight="@+id/input_teza"
android:layout_toRightOf="@+id/calc"
android:onClick="reset"
android:text="@string/reset" />
<Button
android:id="@+id/calc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/input_teza"
android:layout_toRightOf="@+id/teza"
android:onClick="calculeaza"
android:text="@string/calculeaza" />
<EditText
android:id="@+id/input_note"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/teza"
android:digits="1234567890 "
android:ems="10"
android:inputType="number|text"
android:singleLine="true" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/note"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/input_note"
android:layout_alignBottom="@+id/input_note"
android:layout_alignParentLeft="true"
android:text="@string/note"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="@+id/input_teza"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/input_note"
android:layout_below="@+id/input_note"
android:digits="1234567890 "
android:ems="10"
android:inputType="number|text"
android:maxLength="2"
android:singleLine="true" />
<TextView
android:id="@+id/teza"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/input_teza"
android:layout_alignBottom="@+id/input_teza"
android:layout_alignLeft="@+id/note"
android:text="@string/teza"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/suma"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/teza"
android:layout_below="@+id/calc"
android:text="@string/suma"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/mediaaritmetica"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/suma"
android:layout_below="@+id/suma"
android:text="@string/mediaaritmetica"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/mediaponderata"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/mediaaritmetica"
android:layout_below="@+id/mediaaritmetica"
android:text="@string/mediaponderata"
android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>main.java
package tk.d3xt3r01.medie;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import android.app.Activity;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
public void reset(View view){
TextView input_note = (TextView) findViewById(R.id.input_note);
input_note.setText("");
TextView input_teza = (TextView) findViewById(R.id.input_teza);
input_teza.setText("");
TextView mediaaritmetica = (TextView) findViewById(R.id.mediaaritmetica);
mediaaritmetica.setText("");
TextView mediaponderata = (TextView) findViewById(R.id.mediaponderata);
mediaponderata.setText("");
TextView suma = (TextView) findViewById(R.id.suma);
suma.setText("");
input_note.requestFocus();
}
public String implode(String glue, String[] strArray){
String ret = "";
for(int i=0;i<strArray.length;i++)
{
ret += (i == strArray.length - 1) ? strArray[i] : strArray[i] + glue;
}
return ret;
}
public void calculeaza(View view){
TextView input_note = (TextView) findViewById(R.id.input_note);
TextView input_teza = (TextView) findViewById(R.id.input_teza);
TextView media_ponderata = (TextView) findViewById(R.id.mediaponderata);
TextView media_aritmetica = (TextView) findViewById(R.id.mediaaritmetica);
TextView text_suma = (TextView) findViewById(R.id.suma);
DecimalFormat df = new DecimalFormat("##.##");
df.setRoundingMode(RoundingMode.DOWN);
double sum = 0.0;
double num_note = 0.0;
double m = 0.0;
double mp = 0.0;
double teza = 0.0;
String[] note;
try{
note = input_note.getText().toString().split("\\s+");
num_note = note.length;
double num = 0;
for(int i=0;i<num_note;i++){
num = Integer.parseInt(note[i]);
sum = sum + num;
}
Log.i("calculeaza", "sum: "+sum);
Log.i("calculeaza", "num_note: "+num_note);
m = sum/num_note;
m = Double.parseDouble(df.format(m).toString());
Log.i("calculeaza", "m: "+m);
mp = m*3.0;
Log.i("calculeaza", "mp = m*3: "+df.format(mp).toString());
}catch(Exception e){
media_ponderata.setText("N-am note ...");
return;
}
try{
teza = Double.parseDouble(input_teza.getText().toString());
mp = mp + teza;
Log.i("calculeaza", "mp+teza: "+df.format(mp).toString());
mp = mp/4.0;
Log.i("calculeaza", "mp/4: "+df.format(mp).toString());
}catch(Exception e){
media_ponderata.setText("N-am teza ...");
return;
}
Double mpf = (((sum/num_note)*3.0)+teza)/4.0;
text_suma.setText((int)num_note+" note: "+implode("+", note)+"="+(int)sum);
media_aritmetica.setText("Media aritmetica: "+(int)sum+"/"+(int)num_note+"="+df.format(m));
media_ponderata.setText("(("+df.format(m)+"*3)+"+Integer.parseInt(input_teza.getText().toString())+")/4="+df.format(mp)+" (sau full: "+df.format(mpf)+")");
}
}