# 9/29 Typesetting/ Celsius trans into Fahrenheit

###### tags: `android` `typesetting`

> [TOC]
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## Celsius trans into Fahrenheit

package com.example.project1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void buttonClick (View view){
        EditText txtTemp = findViewById(R.id.txtTemp);
        int tmp = Integer.parseInt(txtTemp.getText().toString());

        double result = (9.0*tmp)/5.0 + 32.0;

        TextView tempF = findViewById(R.id.tempF);
        tempF.setText("F" + result);
    }
}


## Typesetting

public void buttonClick(View view){
TextView cm = findViewById(R.id.cm);
TextView kg = findViewById(R.id.kg);

// int cmNumber = Integer.parseInt(cm.getText().toString());
// int kgNumber = Integer.parseInt(cm.getText().toString());

double cmNumber = Double.parseDouble(cm.getText().toString());
double kgNumber = Double.parseDouble(kg.getText().toString());

//calculate BMI
double mNumber = cmNumber/100;
double BMI = kgNumber/(mNumber*mNumber);

TextView result = findViewById(R.id.result);
result.setText("BMI: "\+ BMI);
}

public void clearClick(View view){
TextView cm = findViewById(R.id.cm);
TextView kg = findViewById(R.id.kg);
TextView result = findViewById(R.id.result);

cm.setText("0");
kg.setText("0");
result.setText("0");
}

Layout

Click calculate button

Click clear button

## occur problem

### virtual Phone machine CRASH

solve way

Power off the computer

And then go to the Device management

Click Cold boot now