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Ich erstelle eine Anwendung, in der TextInputLayout auf Null-Zeiger verweist und ich bin nicht in der Lage, hier ist mein Code.TextInputLayout ist Refrencing auf Null-Objekt?
public class MainActivity extends AppCompatActivity {
EditText inputName,inputDepartment,inputPost;
TextInputLayout inputLayoutName,inputLayoutDepartment,inputLayoutPost;
Button btnSave;
LinearLayout linearLayout;
//DBHelper dbHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setLogo(R.drawable.image);
inputName=(EditText)findViewById(R.id.input_name);
inputDepartment=(EditText)findViewById(R.id.input_dept);
inputPost=(EditText)findViewById(R.id.input_post);
inputLayoutName=(TextInputLayout)findViewById(R.id.input_layout_name);
inputLayoutDepartment=(TextInputLayout)findViewById(R.id.input_layout_department);
inputLayoutPost=(TextInputLayout)findViewById(R.id.input_layout_post);
btnSave=(Button)findViewById(R.id.login);
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
submitForm();
}
});
if (getIntent().getBooleanExtra("EXIT", false))
{
finish();
}
}
private void submitForm() {
if (!validateName()) {
return;
}
if (!validateDept()) {
return;
}
if (!validatePost()) {
return;
}
Snackbar snackbar= Snackbar.make(linearLayout,"Details Stored",Snackbar.LENGTH_LONG);
snackbar.show();
}
private boolean validateName() {
if (inputName.getText().toString().trim().isEmpty()) {
inputLayoutName.setError(getString(R.string.err_msg_name));
requestFocus(inputName);
return false;
} else {
inputLayoutName.setErrorEnabled(false);
}
return true;
}
private boolean validateDept() {
if (inputDepartment.getText().toString().trim().isEmpty()) {
inputLayoutDepartment.setError(getString(R.string.err_msg_name));
requestFocus(inputDepartment);
return false;
} else {
inputLayoutDepartment.setErrorEnabled(false);
}
return true;
}
private boolean validatePost() {
if (inputPost.getText().toString().trim().isEmpty()) {
inputLayoutPost.setError(getString(R.string.err_msg_name));
requestFocus(inputPost);
return false;
} else {
inputLayoutPost.setErrorEnabled(false);
}
return true;
}
private void requestFocus(View view) {
if (view.requestFocus()) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}
}
private class MyTextWatcher implements TextWatcher{
private View view;
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
switch (view.getId()){
case R.id.input_name:
validateName();
break;
case R.id.input_dept:
validateDept();
break;
case R.id.input_post:
validatePost();
break;
}
}
}
}
Hier
inputLayoutName = (TextInputLayout) findViewById (R.id.input_layout_name); inputLayoutDepartment = (TextInputLayout) findViewById (R.id.input_layout_department); inputLayoutPost = (TextInputLayout) findViewById (R.id.input_layout_post);
verweist auf Nullzeiger.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.ankittale.tp_contentprovider.MainActivity"
tools:showIn="@layout/activity_main"
android:fillViewport="true">
<LinearLayout
android:id="@+id/linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="60dp">
<android.support.design.widget.TextInputLayout
android:id="@+id/layout_name"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/input_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:singleLine="true"
android:hint="@string/full_name"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/layout_dept"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/input_dept"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:singleLine="true"
android:hint="@string/department"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/layout_post"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/input_post"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:singleLine="true"
android:hint="@string/post_designation"/>
</android.support.design.widget.TextInputLayout>
<Space
android:layout_width="1dp"
android:layout_height="50dp"/>
<LinearLayout
android:layout_below="@+id/Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="?android:attr/dividerVertical">
<Button
android:id="@+id/login"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/save"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
</LinearLayout>
</ScrollView>