have you declare the activity in the manifest..??
On Mon, Jan 25, 2016 at 2:59 AM, Zaher abou khashbeh <
[email protected]> wrote:
> I have created 3 activities
> MainActivity has 2 layouts in it, on setOnClickListener it starts the
> other activity
>
> the first onClickListener works find and it starts the 2nd activity. but
> the second onClickListener crashes the application when I click on that
> layout, eventhough I copied and pasted the code from the first
> onClickListener.
>
> here is the code from the MainActivity
>
> public class MainActivity extends AppCompatActivity {
>
> @Override
> protected void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.activity_main);
>
> RelativeLayout twopoints = (RelativeLayout)
> findViewById(R.id.layout_twopoints);
> twopoints.setOnClickListener(new View.OnClickListener() {
> @Override
> public void onClick(View v) {
> Intent line2points = new Intent(MainActivity.this,
> eqn2points.class);//this one works fine
> startActivity(line2points);
> }
> });
>
> RelativeLayout lines = (RelativeLayout)
> findViewById(R.id.layout_relativeline);
> lines.setOnClickListener(new View.OnClickListener() {
> @Override
> public void onClick(View v) {
> Intent line2line = new Intent(MainActivity.this,
> eqn_para_perp.class);// this one crashes
> startActivity(line2line);
> }
> });
>
> }
> }
>
>
>
>
>
> this is the required activity that crashes
>
>
>
> public class eqn_para_perp extends AppCompatActivity {
>
> @Override
> protected void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.activity_eqn_para_perp);
>
> RelativeLayout para = (RelativeLayout) findViewById(R.id.parallel);
> para.setOnClickListener(new View.OnClickListener() {
> @Override
> public void onClick(View v) {
> Intent line2point = new Intent(eqn_para_perp.this,
> parallel_line.class);
> startActivity(line2point);
> }
> });
>
> RelativeLayout perp = (RelativeLayout)
> findViewById(R.id.perpendicular);
> perp.setOnClickListener(new View.OnClickListener() {
> @Override
> public void onClick(View v) {
> Intent line2point = new Intent(eqn_para_perp.this,
> perpendicular_line.class);
> startActivity(line2point);
> }
> });
>
> }
> }
>
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