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Je souhaite passer d'une activité normale sans viewpager, tablayout ou fragment à une activité contenant tablayout, fragments et viewpager.Modification de l'activité contenant Viewpager avec Fragments impossible
Everytime I exécuté:
Intent intent = new Intent(this, SecondActivity.class);
this.startActivity(intent);
finish();
Mon App arrête et je ne peux pas charger.
Mise à jour:
Deuxième code d'activité:
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.Typeface;
import android.net.Uri;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.VideoView;
import uk.co.chrisjenx.calligraphy.CalligraphyConfig;
import uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper;
public class SecondActivity extends AppCompatActivity {
private TabLayout tabToolbar;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CalligraphyConfig.initDefault(new CalligraphyConfig.Builder()
.setDefaultFontPath("fonts/century.ttf")
.setFontAttrId(R.attr.fontPath)
.build()
);
SectionsPagerAdapter mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
viewPager = (ViewPager) findViewById(R.id.container);
viewPager.setAdapter(mSectionsPagerAdapter);
tabToolbar = (TabLayout) findViewById(R.id.tabToolbar);
tabToolbar.setupWithViewPager(viewPager);
tabToolbar.getTabAt(0).setIcon(R.mipmap.home_button);
tabToolbar.getTabAt(1).setIcon(R.mipmap.pay_button);
tabToolbar.getTabAt(2).setIcon(R.mipmap.video_button);
tabToolbar.getTabAt(3).setIcon(R.mipmap.bill_button);
tabToolbar.getTabAt(tabToolbar.getSelectedTabPosition()).getIcon().setColorFilter(Color.parseColor("#FFFFFF"), PorterDuff.Mode.SRC_IN);
tabToolbar.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
tabToolbar.getTabAt(tabToolbar.getSelectedTabPosition()).getIcon().setColorFilter(Color.parseColor("#FFFFFF"), PorterDuff.Mode.SRC_IN);
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
tabToolbar.getTabAt(tabToolbar.getSelectedTabPosition()).getIcon().setColorFilter(Color.parseColor("#e40079"), PorterDuff.Mode.SRC_IN);
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}
}
Que puis-je faire pour commencer une activité qui containts viewpager avec des fragments?
Mise à jour: LogCat:
09-09 14:59:11.002 2650-2650/com.example.fdai3744.t_online20 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.fdai3744.t_online20, PID: 2650
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fdai3744.t_online20/com.example.fdai3744.t_online20.SecondActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.view.ViewPager.setAdapter(android.support.v4.view.PagerAdapter)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.view.ViewPager.setAdapter(android.support.v4.view.PagerAdapter)' on a null object reference
at com.example.fdai3744.t_online20.SecondActivity.onCreate(SecondActivity.java:41)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
postez votre deuxième code d'activité –
Donc j'ai fait. Voir ci-dessous ma question. –
Si votre application s'arrête, ajoutez le logcat à la question –