我有一个带有三个标签的应用，我使用FragmentPagerAdapter进行控制。现在，当我点击一个片段的TextView时，我想在这些选项卡之间跳转（带有TextView的片段应该替换为目标片段）。当我点击Button时，另一个片段应覆盖在此片段上方Button。
我知道那些是两个不同的东西，但我也知道我必须使用FragmentTransaction但我无法弄清楚如何做到这一点。
你能帮我吗？
这是我的MainActivy.java：
package letscho.workout;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
ViewPager viewPager;
TabLayout tabLayout;
FragmentManager fragmanager;
FragmentTransaction fragtrans;
Fragment1 fragment1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.viewpager);
ViewPagerAdapter1 viewPagerAdapter1 = new ViewPagerAdapter1(getSupportFragmentManager());
viewPager.setAdapter(viewPagerAdapter1);
tabLayout = (TabLayout) findViewById(R.id.tablayout);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
tabLayout.setupWithViewPager(viewPager);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
public static void changefragmentOnBtnClick(){
fragmanager = getFragmentManager();
fragtrans = fragmanager.beginTransaction();
fragtrans.replace(R.id.viewpager, getActivity());
fragtrans.commit();
}
}
ViewPager：
package letscho.workout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class ViewPagerAdapter1 extends FragmentPagerAdapter {
String [] tabtitlearray = {"Übungen", "Push", "Pull"};
public ViewPagerAdapter1 (FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0: return new Fragment1();
case 1: return new Fragment2();
case 2: return new Fragment3();
}
return null;
}
@Override
public int getCount() {
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
return tabtitlearray[position];
}
}
片段所有应该开始的地方：
package letscho.workout;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Fragment2 extends Fragment {
View contentView2;
TextView textView;
Button btn1;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
contentView2 = inflater.inflate(R.layout.layout2_push, null);
return contentView2;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
textView = (TextView)contentView2.findViewById(R.id.push_text_eins);
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MainActivity.changefragmentOnBtnClick();
}
});
btn1 = (Button) contentView2.findViewById(R.id.btn_timer1);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
@Override
public void onStop() {
super.onStop();
}
}