compileSDKVersion是26
minSDKVersion是15
logcat向我显示此错误
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class Button
并且错误指向这一主要活动
setContentView(R.layout.activity_main);
我的主要活动是
公共类MainActivity扩展了AppCompatActivity {
Button btnSignIn,btnRegister;
RelativeLayout rootLayout;
FirebaseAuth auth;
FirebaseDatabase db;
DatabaseReference users;
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
CalligraphyConfig.initDefault(new CalligraphyConfig.Builder()
.setDefaultFontPath("fonts/Arkhip_font.ttf")
.setFontAttrId(R.attr.fontPath)
.build());
setContentView(R.layout.activity_main);
//initialization of firebase
auth = FirebaseAuth.getInstance();
db=FirebaseDatabase.getInstance();
users=db.getReference("Users");
btnRegister =(Button)findViewById(R.id.btnRegister);
btnSignIn=(Button)findViewById(R.id.btnSignIn);
rootLayout= (RelativeLayout) findViewById(R.id.rootLayoutMax);
//Event
btnRegister.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showRegisterDialog();
}
});
btnSignIn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showLoginDialog();
}
});
}
private void showLoginDialog() {
final AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("SIGN IN ");
dialog.setMessage("Please use email to sign in");
LayoutInflater inflater = LayoutInflater.from(this);
View login_layout = inflater.inflate(R.layout.layout_login,null);
final MaterialEditText edtEmail = login_layout.findViewById(R.id.edtEmail);
final MaterialEditText edtPassword = login_layout.findViewById(R.id.edtPassword);
dialog.setView(login_layout);
//Setting Button
dialog.setPositiveButton("SIGN IN", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
//Check validation
if (TextUtils.isEmpty(edtEmail.getText().toString())) {
Snackbar.make(rootLayout, "Please enter email address", Snackbar.LENGTH_LONG).show();
return;
}
if (TextUtils.isEmpty(edtPassword.getText().toString())) {
Snackbar.make(rootLayout, "Please enter password", Snackbar.LENGTH_LONG).show();
return;
}
if (edtPassword.getText().toString().length() < 6) {
Snackbar.make(rootLayout, "Password too short", Snackbar.LENGTH_LONG).show();
return;
}
//Login
auth.signInWithEmailAndPassword(edtEmail.getText().toString(),edtPassword.getText().toString())
.addOnSuccessListener(new OnSuccessListener<AuthResult>() {
@Override
public void onSuccess(AuthResult authResult) {
startActivity(new Intent(MainActivity.this,Welcome.class));
finish();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Snackbar.make(rootLayout,"Failed"+e.getMessage(),Snackbar.LENGTH_SHORT)
.show();
}
});
}
});
dialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
dialog.show();
}
private void showRegisterDialog() {
final AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("REGISTER ");
dialog.setMessage("Please use email to register");
LayoutInflater inflater = LayoutInflater.from(this);
View register_layout = inflater.inflate(R.layout.layout_register,null);
final MaterialEditText edtEmail = register_layout.findViewById(R.id.edtEmail);
final MaterialEditText edtPassword = register_layout.findViewById(R.id.edtPassword);
final MaterialEditText edtName = register_layout.findViewById(R.id.edtName);
final MaterialEditText edtPhone = register_layout.findViewById(R.id.edtPhone);
dialog.setView(register_layout);
//Setting Button
dialog.setPositiveButton("REGISTER", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
//Check validation
if(TextUtils.isEmpty(edtEmail.getText().toString())){
Snackbar.make(rootLayout,"Please enter email address",Snackbar.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(edtPhone.getText().toString())){
Snackbar.make(rootLayout,"Please enter phone number",Snackbar.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(edtPassword.getText().toString())){
Snackbar.make(rootLayout,"Please enter password",Snackbar.LENGTH_LONG).show();
return;
}
if(edtPassword.getText().toString().length() < 6){
Snackbar.make(rootLayout,"Password too short",Snackbar.LENGTH_LONG).show();
return;
}
//Register new user
auth.createUserWithEmailAndPassword(edtEmail.getText().toString(),edtPassword.getText().toString())
.addOnSuccessListener(new OnSuccessListener<AuthResult>() {
@Override
public void onSuccess(AuthResult authResult) {
//That will save user to db
User user = new User();
user.setEmail(edtEmail.getText().toString());
user.setPassword(edtPassword.getText().toString());
user.setName(edtName.getText().toString());
user.setPhone(edtPhone.getText().toString());
//It will use email to key
users.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.setValue(user)
.addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
Snackbar.make(rootLayout,"Register success fully",Snackbar.LENGTH_LONG).show();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Snackbar.make(rootLayout,"Failed"+e.getMessage(),Snackbar.LENGTH_LONG).show();
}
});
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Snackbar.make(rootLayout,"Failed"+e.getMessage(),Snackbar.
LENGTH_LONG).show();
}
});
}
});
dialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
dialog.show();
}
}
和按钮backgroud xml是
<?xml version="1.0" encoding="utf-8"?>
<ripple
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:color="@color/rippleEffectColor"
tools:targetApi="lollipop"
>
<item>
<shape android:shape="rectangle">
<solid android:color="@android:color/white"></solid>
<stroke android:color="@android:color/white" android:width="2dp">
</stroke>
<corners android:radius="2dp"/>
</shape>
</item>
</ripple>
答案 0 :(得分：0)
在API 21中添加了Ripple，因此不能在下面使用它。 查看此库，以便在您的视图中为以下API 21添加涟漪效果 https://github.com/balysv/material-ripple