java - 我的更改活动按钮不起作用
问题描述
所以....我正在尝试将此按钮从主要活动更改为 Disciplinas_Activity。但是每当我尝试运行应用程序并单击按钮时,应用程序就会崩溃。请记住,我在同一个活动中还有其他 3 个按钮完全相同(除了它们指向不同活动的事实)并且它们都使用相同的基本代码。
这是主要活动的 .xml 代码
<TextView
android:id="@+id/textView_emailnotverified"
android:layout_width="172dp"
android:layout_height="34dp"
android:background="@color/white"
android:text="Email não Verificado!"
android:textColor="#E41F1F"
android:textSize="18dp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.066"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.516" />
<TextView
android:id="@+id/textView_studentEmail"
android:layout_width="237dp"
android:layout_height="40dp"
android:text="Email do aluno"
android:textColor="@color/white"
android:textSize="18dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.856"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.395" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="332dp"
android:layout_height="168dp"
android:scaleX="2"
android:scaleY="1.3"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.493"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.028"
app:srcCompat="@drawable/etpr" />
<TextView
android:id="@+id/welcommingtextview5"
android:layout_width="337dp"
android:layout_height="39dp"
android:text="ESCOLA TÉCNICA E PROFISSIONAL DO RIBATEJO"
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.459"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.15" />
<TextView
android:id="@+id/ETPRTitle5"
android:layout_width="258dp"
android:layout_height="30dp"
android:text="BEM-VINDO À ETPR"
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="24dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.496"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.105" />
<Button
android:id="@+id/Button_LOGOUT"
android:layout_width="114dp"
android:layout_height="59dp"
android:text="Logout"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.934" />
<Button
android:id="@+id/button_Testes"
android:layout_width="108dp"
android:layout_height="47dp"
android:text="Testes"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.867"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.644" />
<Button
android:id="@+id/button_pdf"
android:layout_width="121dp"
android:layout_height="41dp"
android:text="PDF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.894"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.753" />
<Button
android:id="@+id/button_historia"
android:layout_width="191dp"
android:layout_height="47dp"
android:text="Sobre o criador"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.149"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.76" />
<ImageView
android:id="@+id/imageView_perfil"
android:layout_width="122dp"
android:layout_height="118dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.055"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.376"
app:srcCompat="@mipmap/ic_launcher" />
<TextView
android:id="@+id/textView_studentname"
android:layout_width="236dp"
android:layout_height="33dp"
android:text="Nome do aluno"
android:textColor="@color/white"
android:textSize="18dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.857"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.329" />
<Button
android:id="@+id/button_emailverification"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Verificar agora"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.88"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.527" />
<Button
android:id="@+id/changeprofileBTN"
android:layout_width="245dp"
android:layout_height="41dp"
android:text="Mude a imagem de perfil"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.897"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.453" />
<Button
android:id="@+id/button_disciplinas"
android:layout_width="194dp"
android:layout_height="55dp"
android:text="Disciplinas"
android:clickable="true"
android:focusable="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.106"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.644" />
这是我的主要活动的 .java 代码
public class MainActivity extends AppCompatActivity {
TextView fullname, email, verifymessage;
FirebaseAuth fAuth;
FirebaseFirestore fstore;
String userID;
Button resendVerification, LogoutBTN, changeprofileBTN, tests, createrInfo, pdfdatabase, buttonDisciplinas;
ImageView profileImage;
StorageReference storageReference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fullname = findViewById(R.id.textView_studentname);
email = findViewById(R.id.textView_studentEmail);
LogoutBTN = (Button) findViewById(R.id.Button_LOGOUT);
tests =(Button) findViewById(R.id.button_Testes);
createrInfo =(Button) findViewById(R.id.button_historia);
pdfdatabase =(Button) findViewById(R.id.button_pdf);
buttonDisciplinas = findViewById(R.id.button_disciplinas);
buttonDisciplinas.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, Disciplinas_Activity.class));
}
});
tests.setOnClickListener(new View.OnClickListener() {// menu dos testes
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(),Testes_Activity.class));
}
});
createrInfo.setOnClickListener(new View.OnClickListener() {//página sobre a história da app
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(),AboutMe_Activity.class));
}
});
pdfdatabase.setOnClickListener(new View.OnClickListener() {//pdf database
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(),PDF_Activity.class));
}
});
LogoutBTN.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(getApplicationContext(),LoginScreen.class));
finish();
}
});
profileImage = findViewById(R.id.imageView_perfil);
changeprofileBTN = findViewById(R.id.changeprofileBTN);
fAuth = FirebaseAuth.getInstance();
fstore = FirebaseFirestore.getInstance();
storageReference = FirebaseStorage.getInstance().getReference();
StorageReference profileRef = storageReference.child("utilizadores/"+fAuth.getCurrentUser().getUid()+"/perfil.jpg");
profileRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Picasso.get().load(uri).into(profileImage);
}
});
resendVerification = findViewById(R.id.button_emailverification);
verifymessage = findViewById(R.id.textView_emailnotverified);
userID = fAuth.getCurrentUser().getUid();
DocumentReference documentReference = fstore.collection("utilizadores").document(userID);
documentReference.addSnapshotListener(this, new EventListener<DocumentSnapshot>() {
@Override
public void onEvent(@Nullable DocumentSnapshot documentSnapshot, @Nullable FirebaseFirestoreException error) {
fullname.setText(documentSnapshot.getString("NomeCompleto"));
email.setText(documentSnapshot.getString("Email"));
}
});
FirebaseUser user = fAuth.getCurrentUser();
if (!user.isEmailVerified()){
verifymessage.setVisibility(View.VISIBLE);
resendVerification.setVisibility(View.VISIBLE);
resendVerification.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
user.sendEmailVerification().addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
Toast.makeText(v.getContext(),"Email de verificação enviado.", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Log.d("tag","Erro: Email de verificação não enviado " + e.getMessage());
}
});
}
});
}
changeprofileBTN.setOnClickListener(new View.OnClickListener() { //mudar imagem de perfil
@Override
public void onClick(View v) {
Intent openGalleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(openGalleryIntent,1000);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1000 ){
if (resultCode == Activity.RESULT_OK){//se o resultado for igual então abre galeria
Uri imageUri = data.getData();
//profileImage.setImageURI(imageUri); //insere imagem escolhida na galeria
uploadImageToFirebase(imageUri);
}
}
}
private void uploadImageToFirebase(Uri imageUri) { //upload da imagem para base de dados
StorageReference fileReference = storageReference.child("utilizadores/"+fAuth.getCurrentUser().getUid()+"/perfil.jpg");
fileReference.putFile(imageUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
fileReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Picasso.get().load(uri).into(profileImage);
}
});
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(MainActivity.this,"Erro", Toast.LENGTH_SHORT).show();
}
});
}
}
这是 DisciplinasActivity 的 .xml 代码
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:id="@+id/Relative_Layout_Title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="32dp"
android:layout_marginRight="20dp">
<TextView
android:id="@+id/Menu_Title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Disciplinas"
android:textColor="@color/white"
android:textSize="22sp">
</TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/Menu_Title"
android:layout_marginTop="6dp"
android:text="ETPR"
android:textColor="@color/white"
android:textSize="14sp">
</TextView>
<TextView
android:id="@+id/Name_Data"
android:textColor="@color/white"
android:textSize="16sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toStartOf="@id/user_icon"
android:text="Nome">
</TextView>
<TextView
android:id="@+id/Email_Data"
android:textColor="@color/white"
android:textSize="16dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/Name_Data"
android:layout_toStartOf="@id/user_icon"
android:text="Email">
</TextView>
<ImageView
android:id="@+id/user_icon"
android:layout_width="62dp"
android:layout_height="62dp"
android:layout_alignParentRight="true"
app:srcCompat="@drawable/cara">
</ImageView>
</RelativeLayout>
<GridLayout
android:id="@+id/MainGrid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@+id/Relative_Layout_Title"
android:alignmentMode="alignMargins"
android:columnCount="2"
android:columnOrderPreserved="false"
android:rowCount="2">
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_margin="12dp"
android:layout_marginTop="70dp"
app:cardCornerRadius="12dp"
app:cardElevation="6dp">
<LinearLayout
android:id="@+id/LinearLayoutSdac"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical"
android:padding="16dp">
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:src="@drawable/sdac_icon"/>
<TextView
android:layout_width="56dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="12dp"
android:text="SDAC"
android:textColor="@color/black"
android:textSize="18sp">
</TextView>
</LinearLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_margin="12dp"
android:layout_marginTop="70dp"
app:cardCornerRadius="12dp"
app:cardElevation="6dp">
<LinearLayout
android:id="@+id/LinearLayoutEletronica"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical"
android:padding="16dp">
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:src="@drawable/eletronica_icon"
app:srcCompat="@drawable/eletronica_icon" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="12dp"
android:text="Eletrónica"
android:textColor="@color/black"
android:textSize="18sp"/>
</LinearLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_margin="12dp"
android:layout_marginTop="70dp"
app:cardCornerRadius="12dp"
app:cardElevation="6dp">
<LinearLayout
android:id="@+id/LinearLayoutCD"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical"
android:padding="16dp">
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:src="@drawable/cd_icon"
app:srcCompat="@drawable/cd_icon" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="12dp"
android:text="CD"
android:textColor="@color/black"
android:textSize="18sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_margin="12dp"
android:layout_marginTop="70dp"
app:cardCornerRadius="12dp"
app:cardElevation="6dp">
<LinearLayout
android:id="@+id/LinearLayoutIMEI"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical"
android:padding="16dp">
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:src="@drawable/imei_icon"
app:srcCompat="@drawable/imei_icon" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="12dp"
android:text="IMEI"
android:textColor="@color/black"
android:textSize="18sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</GridLayout>
<Button
android:id="@+id/ExitButton"
android:layout_marginTop="20dp"
android:layout_width="121dp"
android:layout_height="69dp"
android:layout_gravity="center"
android:layout_marginBottom="@+id/RelativeLayout"
android:text="Sair"
android:textColor="@color/white"
android:textSize="16dp" />
</LinearLayout>
这是我的 DisciplinasActivity 的 .Java 代码
public class Disciplinas_Activity extends AppCompatActivity {
GridLayout gridPrincipal;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_disciplinas);
gridPrincipal = (GridLayout)findViewById(R.id.MainGrid); //identifica qual a grelha
//ação
setSingleEvent(gridPrincipal);
}
private void setSingleEvent(GridLayout gridPrincipal) {
for (int i =0;i<gridPrincipal.getChildCount();i++)
{
CardView cardView = (CardView)gridPrincipal.getChildAt(i);
final int finalI = i;
cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(),TeacherLoginScreen.class));//muda para Disciplina de Sdac
}
});
}
}
}
What am i missing...? if all the other 3 buttons work...why doesnt this one work? (I am a total newbie but i
I really need the help)
解决方案
在 DisciplinasActivity 的 .xml 代码中,您使用的维度存在一些错误:
<GridLayout
...
android:id="@+id/MainGrid"
...
android:layout_marginBottom="@+id/Relative_Layout_Title" <!-- E.G 20dp -->
>
<Button
android:id="@+id/ExitButton"
...
android:layout_marginBottom="@+id/RelativeLayout" <!-- E.G 20dp -->
... />
对于边距、填充等,您必须使用尺寸,例如 dp、in、mm 等,而不是对其他视图的引用,或者您可以使用dimmens.xml,也许您对android:layout_marginBottom
其他android:layout_constraintBottom_toBottomOf
属性感到困惑。在 .xml 中的所有元素中检查这一点
这个答案是由于您发布的这个日志:
ComponentInfo{studying.app.tkappv6/studying.app.tkappv6.Disciplinas_Activity}:java.lang.UnsupportedOperationException:无法转换为维度:type=0x12
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