You are lucky that that code compiles! (Or more precise, quite the
unlucky one...)
The problem is with your code. First of all you should learn some
Java, otherwise you will be stuck. Basic Concepts like classes,
methods, interfaces, objects, code blocks and syntax.
As for the issue above:
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();
private TextView timer;
public long mStartTime;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main); // This creates the
buttons
Button buttonStart = (Button)
findViewById(R.id.button_start); // These will fail if executed before
setContentView
Button buttonStop = (Button)
findViewById(R.id.button_stop);
timer = (TextView)findViewById(R.id.timer);
buttonStart.setOnClickListener(mStartListener);
buttonStop.setOnClickListener(mStopListener);
} // This is the end of onCreate()
// These are executed well before onCreate (These are called
anonymous inner classes in Java)
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));
}
};
}
On 21 янв, 21:37, Matt <mkabro...@gmail.com> wrote:
> 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));
> }
> };
>
> }
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