功能实现建立三个点击事件对三个碎片进行切换，并且在三个碎片之中建立两个点击事件可以实现Fragment与Fragment相互传递数据并跳转。
代码如下：
Main3Activity
private Button button1;
private Button button2;
private Button button3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3);
button1=findViewById(R.id.ButtonA);
button2=findViewById(R.id.ButtonB);
button3=findViewById(R.id.ButtonC);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment fragment=new OneFragment();//创建待添加的碎片实例
FragmentManager manager=Main3Activity.this.getSupportFragmentManager();//获取FragmentManager
FragmentTransaction transaction=manager.beginTransaction();//开启一个事务
transaction.replace(R.id.name,fragment);//向容器添加或替换碎片
transaction.commit();//提交事务
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment fragment=new TwoFragment();
FragmentManager manager=Main3Activity.this.getSupportFragmentManager();
FragmentTransaction transaction=manager.beginTransaction();
transaction.replace(R.id.name,fragment);
transaction.commit();
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment fragment=new ThreeFragment();
FragmentManager manager=Main3Activity.this.getSupportFragmentManager();
FragmentTransaction transaction=manager.beginTransaction();
transaction.replace(R.id.name,fragment);
transaction.commit();
}
});
}
activity_main3.xml
创建一个叫oneFragment的class并继承Fragment
public class OneFragment extends Fragment {
private TextView textView1;
private TextView textView2;
private Button button1;
private Button button2;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.layout_one,container,false);
textView1=view.findViewById(R.id.takeA);
textView2=view.findViewById(R.id.takeB);
button1=view.findViewById(R.id.skipA);
button2=view.findViewById(R.id.skipB);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
TwoFragment twoFragment=new TwoFragment();//实例化要跳转的fragment对象（也就是你要跳转的下一个碎片）
FragmentTransaction transaction=getFragmentManager().beginTransaction();
transaction.add(R.id.name,twoFragment).addToBackStack(null).commitAllowingStateLoss();
Bundle bundle=new Bundle();//声明一个Bundle对象
String data=textView1.getText().toString();
String g=textView2.getText().toString();
Log.d("ff", "onClick: ");
bundle.putString("msga",data);//用Bundle对象携带需要传递的信息
bundle.putString("msgg",g);
twoFragment.setArguments(bundle);//将bundle对象绑定fragment
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ThreeFragment threeFragment=new ThreeFragment();
Log.d("ff", "onClick: 1");
FragmentTransaction transaction=getFragmentManager().beginTransaction();
Log.d("ff", "onClick: 2");
transaction.add(R.id.name,threeFragment).addToBackStack(null).commitAllowingStateLoss();
String b=textView1.getText().toString();
String k=textView2.getText().toString();
Log.d("ff", "onClick: 6");
Bundle bundle=new Bundle();
bundle.putString("msgb",b);
bundle.putString("msgk",k);
threeFragment.setArguments(bundle);
}
});
return view;
}
layout_one.xml
TwoFragment
public class TwoFragment extends Fragment {
private TextView textView1;
private TextView textView2;
private Button button1;
private Button button2;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.layout_two,container,false);
textView1=view.findViewById(R.id.takeE);
textView2=view.findViewById(R.id.takeF);
button1=view.findViewById(R.id.skipE);
button2=view.findViewById(R.id.skipF);
Bundle bundle1=TwoFragment.this.getArguments();
if (bundle1!=null){//切记要判断内容是否为空，否则程序运行getString方法会报空指针的错误。
textView1.setText(bundle1.getString("msga"));//msga在oneFragment设置好的key值，在此处获取传递过来的内容。
textView2.setText(bundle1.getString("msgg"));
}
Log.d("ff", "onCreateView: ");
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
OneFragment oneFragment=new OneFragment();
FragmentTransaction transaction=getFragmentManager().beginTransaction();
transaction.add(R.id.name,oneFragment).addToBackStack(null).commitAllowingStateLoss();
String c=textView1.getText().toString();
String m=textView2.getText().toString();
Bundle bundle=new Bundle();
bundle.putString("msgc",c);
bundle.putString("msgm",m);
oneFragment.setArguments(bundle);
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ThreeFragment threeFragment=new ThreeFragment();
FragmentTransaction transaction=getFragmentManager().beginTransaction();
transaction.add(R.id.name,threeFragment).addToBackStack(null).commitAllowingStateLoss();
Bundle bundle=new Bundle();
String d=textView1.getText().toString();
String n=textView2.getText().toString();
bundle.putString("msgb",d);
bundle.putString("msgk",n);
threeFragment.setArguments(bundle);
}
});
return view;
}
}
layout_two.xml
ThreeFragment
public class ThreeFragment extends Fragment {
private TextView textView1;
private TextView textView2;
private Button button1;
private Button button2;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.layout_three,container,false);
textView1=view.findViewById(R.id.takeC);
textView2=view.findViewById(R.id.takeD);
button1=view.findViewById(R.id.skipC);
button2=view.findViewById(R.id.skipD);
Bundle bundle1=ThreeFragment.this.getArguments();
if (bundle1!=null) {
textView1.setText(bundle1.getString("msgb"));
textView2.setText(bundle1.getString("msgk"));
}
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
OneFragment oneFragment=new OneFragment();
FragmentTransaction transaction=getFragmentManager().beginTransaction();
transaction.add(R.id.name,oneFragment).addToBackStack(null).commitAllowingStateLoss();
String e=textView1.getText().toString();
String o=textView2.getText().toString();
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
TwoFragment twoFragment=new TwoFragment();
FragmentTransaction transaction=getFragmentManager().beginTransaction();
transaction.add(R.id.name,twoFragment).addToBackStack(null).commitAllowingStateLoss();
Bundle bundle=new Bundle();
String f=textView1.getText().toString();
String p=textView2.getText().toString();
bundle.putString("msga",p);
bundle.putString("msgg",f);
twoFragment.setArguments(bundle);
}
});
return view;
}
@Override
public void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}
}
layout_three.xml