Java 在android:onClick的父或祖先上下文中找不到方法onClickcrea（视图）
当我点击onClick=“onClickcrea”它不工作时，我基本上无法理解。我还试着更改onClick的名称，但这并不重要。我得到这个错误：Java 在android:onClick的父或祖先上下文中找不到方法onClickcrea（视图）,java,android,Java,Android,当我点击onClick=“onClickcrea”它不工作时，我基本上无法理解。我还试着更改onClick的名称，但这并不重要。我得到这个错误： java.lang.IllegalStateException: Could not find method onClickcrea(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.
java.lang.IllegalStateException: Could not find method onClickcrea(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatButton with id 'onClickcrea'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:325)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="purgimon.pt11_marc_purgimon.Registra"
android:weightSum="1">
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:weightSum="1">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/botoUsuari"
android:id="@+id/NUsuari"
android:layout_weight="0.11"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/editText2"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="36dp"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/botoCorreu"
android:id="@+id/Correu"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:layout_width="match_parent"
android:layout_height="32dp"
android:id="@+id/editText3" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="34dp"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/botoTelefon"
android:id="@+id/Correu"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:layout_width="match_parent"
android:layout_height="32dp"
android:id="@+id/editText4" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="0.03"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="36dp"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/botoContrasenya"
android:id="@+id/Contrasenya"
android:textSize="20dp"
android:layout_weight="0.05" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.57">
<EditText
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/editTextContra" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="0.03" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/botoRepeteixContrasenya"
android:id="@+id/ContrasenyRepetida"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/editTextContraR" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="36dp"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="@string/Botosexe"
android:id="@+id/Sexe"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.31"
android:weightSum="1">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="@string/BotoHome"
android:id="@+id/Home"
android:checked="false"
android:layout_weight="0.08" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="@string/botoDona"
android:id="@+id/Dona"
android:layout_weight="0.12"
android:checked="false"
android:layout_marginLeft="150dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="368dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="@string/boto2Ajuda"
android:id="@+id/AjudaRegistra"
android:layout_marginLeft="30dp"
android:onClick="ajuda"/>
<Button
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="@string/botoCrea"
android:id="@+id/onClickcrea"
android:layout_marginLeft="120dp"
android:onClick="onClickcrea" />
</LinearLayout>
</LinearLayout>
我个人建议使用onClickListener而不是XML属性。我个人建议使用onClickListener而不是XML属性。在视图膨胀的活动中找不到android:onClick中定义的方法。 此错误最常见的错误是方法名输入错误和布局错误
如其他评论中所述，您应该使用onClick侦听器。在视图膨胀的活动中找不到android:onClick中定义的方法。 此错误最常见的错误是方法名输入错误和布局错误
正如其他评论中所述，您应该使用onClick监听器。这就是为什么我从不使用
onClickOnClickListenerAjudaRegistraAjudaRegistraonClickOnClickListenerAjudaRegistraAjudaRegistrapublic class Registra extends AppCompatActivity {
String contrasenya1;
String contrasenya2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_registra);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_principal, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void ajuda(View v) {
Intent intent = new Intent(this, Ajuda.class);
startActivity(intent);
}
public void onClickcrea (View view){
EditText textContra1 =(EditText) findViewById(R.id.editTextContra);
contrasenya1 = textContra1.getText().toString();
EditText textContra2 = (EditText) findViewById(R.id.editTextContraR);
contrasenya2 = textContra2.getText().toString();
Toast missatge = Toast.makeText(getApplicationContext(), "Les contrasenyes han de coincidir!", Toast.LENGTH_SHORT);
missatge.show();
}
}