Use log : Log « Core Class « Android

1. Android
2. Core Class
3. Log

Use log

    
package app.test;

import java.text.NumberFormat;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Test extends Activity {
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        final EditText myEditField = (EditText) findViewById(R.id.mealprice);
        final TextView answerfield = (TextView) findViewById(R.id.answer);

        final Button button = (Button) findViewById(R.id.calculate);
        button.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View v) {
                try {
                    String mealprice = myEditField.getText().toString();
                    String answer = "";
                    if (mealprice.indexOf("$") == -1) {
                        mealprice = "$" + mealprice;
                    }
                    NumberFormat nf = java.text.NumberFormat.getCurrencyInstance();
                    if (nf == null) {
                        Log.i("", "NumberFormat is null");
                    }
                    float fmp = nf.parse(mealprice).floatValue();
                    fmp *= 2;
                    Log.i("", "Total:" + fmp);
                    answer = "Full Price:" + nf.format(fmp);
                    answerfield.setText(answer);
                } catch (java.text.ParseException pe) {
                    Log.i("", "Parse exception caught");
                    answerfield.setText("Failed to parse amount?");
                } catch (Exception e) {
                    Log.e("", "Failed to Calculate Tip:" + e.getMessage());
                    e.printStackTrace();
                    answerfield.setText(e.getMessage());
                }
            }
        });
    }
}

// main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Calculator"
    />
<EditText
  android:id="@+id/mealprice"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
  android:autoText="true"
  />
<Button
  android:id="@+id/calculate"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"
    android:text="Calculate Tip"
    /> 
<TextView  
  android:id="@+id/answer"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text=""
    />
    
</LinearLayout>

   
    
    
    
  

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