[英]How to solve the Fragment Error
下面是我的代碼。
MainActivity.java代碼如下:
public class Login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
getSupportFragmentManager().beginTransaction().replace(R.id.loginFrame, new LoginFragment()).commit();
}
}
片段活動 .java代碼,在MainActivity.java中調用
public class LoginFragment extends Fragment {
EditText emailEt,passwordEt;
String email,password;
Button login,signup;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootview = super.onCreateView(inflater, container, savedInstanceState);
emailEt=(EditText)rootview.findViewById(R.id.emailEt);
passwordEt=(EditText)rootview.findViewById(R.id.passEt);
login=(Button)rootview.findViewById(R.id.loginBtn);
signup=(Button)rootview.findViewById(R.id.signupBtn);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
email=emailEt.getText().toString();
password=passwordEt.getText().toString();
if(email.length()==0){
emailEt.requestFocus();
emailEt.setError("FIELD CANNOT BE EMPTY");
}else if(password.length()==0){
passwordEt.requestFocus();
passwordEt.setError("FIELD CANNOT BE EMPTY");
}else{
Toast.makeText(getActivity(),"Validation Done",Toast.LENGTH_SHORT).show();
Intent in=new Intent(getActivity(),Options_class.class);
startActivity(in);
}
}
});
signup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(getActivity(),Signup.class);
startActivity(intent);
}
});
return rootview;
}
}
的代碼錯誤的logcat其顯示在mainclass OnCreate中()錯誤
t dalvik.system.VMRuntime.newNonMovableArray(本地方法)位於android.graphics.BitmapFactory.nativeDecodeAsset(本地方法)位於android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:620)在android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory。 java:455)位於android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1152)位於android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:724)位於android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl .java:575),位於android.content.res.Resources.loadDrawable(Resources.java:854),位於android.content.res.TypedArray.getDrawable(TypedArray.java:928),位於android.widget.ImageView。(ImageView.java :167),位於android.widget.ImageView。(ImageView.java:155),位於android.support.v7.widget.AppCompatImageView。(AppCompatImageView.java:60),位於android.support.v7.widget.AppCompatImageView。(AppCompatImageView.java) :56),位於Andr的android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106) oid.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1021)在android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1080)在android.support.v4.view.Layout。 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:769)上的onCreateView(LayoutInflaterCompatHC.java:47)android.view.LayoutInflater.rInflate(LayoutInflater.java上的android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)上的onCreateView(LayoutInflaterCompatHC.java:47) :858)在android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)在android.view.LayoutInflater.inflate(LayoutInflater.java:518)在android.view.LayoutInflater.inflate(LayoutInflater.java:426)在android android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288)上的.view.LayoutInflater.inflate(LayoutInflater.java:377)在android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140 ),網址為com.example.nirmit.demo_frg.Login。 在android.app.Activity.performCreate(Activity.java:6672)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)在android.app.ActivityThread.performLaunchActivity(ActivityThread.java)上的onCreate(Login.java:13) :2612),位於android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724),位於android.app.ActivityThread.-wrap12(ActivityThread.java),位於android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1473),位於java.lang.reflect上的android.os.Looper.loop(Looper.java:154)上的android.os.Handler.dispatchMessage(Handler.java:102)在android.app.ActivityThread.main(ActivityThread.java:6123)上.com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:867)上的.Method.invoke(本機方法),com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)上的。
任何機構都可以幫助我解決mainActivity和片段代碼中logcat的問題。
修改這行
View rootview = super.onCreateView(inflater, container, savedInstanceState);
進入這個
View rootview = inflater.inflate(R.layout.fragmentlayout, container, false);
public class Login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Bundle bundle = new Bundle();
fragment = new LoginFragment();
fragment.setArguments(bundle);
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.loginFrame, fragment);
fragmentTransaction.commit();
//initToolbar();
}
}
}
和
public class LoginFragment extends Fragment {
View rootview;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootview = inflater.inflate(your_layout, null);
return rootview;
}
}
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