Crimson Major
01-21-2011, 01:41 PM
Hello all,
Im new to android dev, and am getting a force close on my first app. Its supposed to start a timer when one button is clicked and stop it when another is clicked. Its probably a basic rookie mistake, but I cant for the life of me work it out. Any help would be much appreciated!
Hello,
Im new to android dev, and am getting a force close on my first application and I cant figure it out for the life of me. Hope someone can spot it!
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class inputTest extends Activity {
private Handler mHandler = new Handler();
public long mStartTime;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart.setOnClickListener(mStartListener);
buttonStop.setOnClickListener(mStopListener);
}
Button buttonStart = (Button) findViewById(R.id.button_start);
Button buttonStop = (Button) findViewById(R.id.button_stop);
TextView timer = (TextView)findViewById(R.id.timer);
OnClickListener mStartListener = new OnClickListener () {
public void onClick (View v) {
if (mStartTime == 0L){
mStartTime = System.currentTimeMillis();
mHandler.removeCallbacks(mUpdateTimeTask);
mHandler.postDelayed(mUpdateTimeTask, 100);
}
}
};
OnClickListener mStopListener = new OnClickListener() {
public void onClick(View v) {
mHandler.removeCallbacks(mUpdateTimeTask);
}
};
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
final long start = mStartTime;
long millis = SystemClock.uptimeMillis() - start;
int seconds = (int) (millis / 1000);
int minutes = seconds / 60;
seconds = seconds % 60;
if (seconds < 10) {
timer.setText("" + minutes + ":0" + seconds);
} else {
timer.setText("" + minutes + ":" + seconds);
}
mHandler.postAtTime(this,
start + (((minutes * 60) + seconds + 1) * 1000));
}
};
}
Im new to android dev, and am getting a force close on my first app. Its supposed to start a timer when one button is clicked and stop it when another is clicked. Its probably a basic rookie mistake, but I cant for the life of me work it out. Any help would be much appreciated!
Hello,
Im new to android dev, and am getting a force close on my first application and I cant figure it out for the life of me. Hope someone can spot it!
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class inputTest extends Activity {
private Handler mHandler = new Handler();
public long mStartTime;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart.setOnClickListener(mStartListener);
buttonStop.setOnClickListener(mStopListener);
}
Button buttonStart = (Button) findViewById(R.id.button_start);
Button buttonStop = (Button) findViewById(R.id.button_stop);
TextView timer = (TextView)findViewById(R.id.timer);
OnClickListener mStartListener = new OnClickListener () {
public void onClick (View v) {
if (mStartTime == 0L){
mStartTime = System.currentTimeMillis();
mHandler.removeCallbacks(mUpdateTimeTask);
mHandler.postDelayed(mUpdateTimeTask, 100);
}
}
};
OnClickListener mStopListener = new OnClickListener() {
public void onClick(View v) {
mHandler.removeCallbacks(mUpdateTimeTask);
}
};
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
final long start = mStartTime;
long millis = SystemClock.uptimeMillis() - start;
int seconds = (int) (millis / 1000);
int minutes = seconds / 60;
seconds = seconds % 60;
if (seconds < 10) {
timer.setText("" + minutes + ":0" + seconds);
} else {
timer.setText("" + minutes + ":" + seconds);
}
mHandler.postAtTime(this,
start + (((minutes * 60) + seconds + 1) * 1000));
}
};
}