錯誤代碼
Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
at com.example.useweb0204.tab1.onCreateView(tab1.java:54)
tab1:54是這條錯誤
String test1 = bundle.getString("DATA");
這是我輸入的地方 我很確定我的string name這邊有值
String name=jsonData.getString("id");
String email=jsonData.getString("password");
String phone=jsonData.getString("user_phone");
Intent intent= new Intent();
Bundle bundle = new Bundle();
tab1 myFragment = new tab1();
//bundle.putString("user_id",name);//傳遞Double
//bundle.putString("user_phone",id_phone);//傳遞Double
/*往bundle中添加数据*/
//bundle.putInt("index",index);
bundle.putString("test1", name);
/*把数据设置到Fragment中*/
myFragment.setArguments(bundle);
intent.setClass(Login.this, home.class);
//intent.putExtras(bundle);
startActivity(intent);
finish();
tab1fragment 我想在這邊接收值
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tab1, container, false);
error_id = view.findViewById(R.id.error);
Bundle bundle = this.getArguments();
String test1 = bundle.getString("test1");
error_id.setText(test1.toString());
return view;
}
這是我的home.class
public class home extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
initView();
}
private BottomNavigationView mBv;
private ViewPager mVp;
private void initView() {
mBv = (BottomNavigationView) findViewById(R.id.bv);
mVp = (ViewPager) findViewById(R.id.vp);
mBv.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
mVp.setCurrentItem(0);
return true;
case R.id.navigation_love:
mVp.setCurrentItem(1);
return true;
case R.id.navigation_shop_cart:
mVp.setCurrentItem(2);
return true;
case R.id.navigation_search:
mVp.setCurrentItem(3);
return true;
}
return false;
}
});
//数据填充
setupViewPager(mVp);
//ViewPager监听
mVp.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
mBv.getMenu().getItem(position).setChecked(true);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
//停止滑動
// mVp.setOnTouchListener(new View.OnTouchListener() {
// @Override
// public boolean onTouch(View v, MotionEvent event) {
// return true;
// }
// });
}
private void setupViewPager(ViewPager viewPager) {
BottomAdapter adapter = new BottomAdapter(getSupportFragmentManager());
adapter.addFragment(new tab1());
adapter.addFragment(new tab2());
adapter.addFragment(new tab3());
adapter.addFragment(new tab4());
viewPager.setAdapter(adapter);
}
}
請把你的tabfragment改這樣試試
Intent intent = this.getIntent();
Bundle bundle=intent.getExtras();
String test1 = bundle.getString("test1");