Ok so my program is supposed to help a user keep track of the progress they have made at any particular task.
It has an <EditText>
view that will ask a user to input a number, the program has an OnClickListener()
that will activate a sequence of code once the user clicks a button to add the numerical input.
The sequence turns this input into a string then an int. The int is added to the progress of a status bar (which is used only as a graphical representation of their progress).
I am getting no errors on Netbeans, and nothing seems to be intuitively wrong with what I wrote, but the app crashes every time I try to run it.This is my first time attempting progress bars so I might just be missing something I'm not seeing. Thanks for any help you are able to provide! I really appreciate it!
package com.example.progresstracker;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
public class MainActivity extends Activity {
Button add;
ProgressBar mProgress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mProgress.setProgress(0);
mProgress.setMax(100);
add = (Button) findViewById(R.id.bAdd);
mProgress = (ProgressBar) findViewById(R.id.prog);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
EditText eText = (EditText) findViewById(R.id.edit);
String message = eText.getText().toString();
int num = Integer.parseInt(message);
mProgress.incrementProgressBy(num);
}
});
}
@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;
}
}
Try putting this line
mProgress = (ProgressBar) findViewById(R.id.prog);
Before this line
mProgress.setProgress(0);
You need to initialise mProgress before you can start calling its methods.
Ps If you're getting errors its always useful to include the stack trace alongside your code.
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