Android fragments in actionBar tabs

2019-08-29 01:04发布

站内问答 / Android
604 1 6

So I have 3 actionBar tabs running 3 different fragment classes. In Tab1 of the actionBar I have a simple form that a user fills in and the data is then saved in an SQLite database, this form and the tasks carried out on it work fine as a project by itself but when I tried to integrate it as a fragment (FragmentTab1) then the app crashes when I click the save button. Any ideas as to why it may be crashing? I think I may have to implement an onClickListener maybe, not sure though! I am aware that the way I am using tabs and fragments is a bit outdated but I'd still like to get it working this way.

Error Log

        02-14 16:42:14.560  10914-10914/com.androidbegin.absfragtabhost/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.androidbegin.absfragtabhost, PID: 10914
java.lang.IllegalStateException: Could not find a method addButtonClicked(View) in the activity class com.androidbegin.absfragtabhost.MainActivity for onClick handler on view class android.widget.Button with id 'addButtonClicked'
        at android.view.View$1.onClick(View.java:3828)
        at android.view.View.performClick(View.java:4456)
        at android.view.View$PerformClick.run(View.java:18465)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5086)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
        at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoSuchMethodException: addButtonClicked [class android.view.View]
        at java.lang.Class.getConstructorOrMethod(Class.java:472)
        at java.lang.Class.getMethod(Class.java:857)
        at android.view.View$1.onClick(View.java:3821)
        at android.view.View.performClick(View.java:4456) 
        at android.view.View$PerformClick.run(View.java:18465)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5086) 
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
        at dalvik.system.NativeStart.main(Native Method)

FragmentTab1.java

package com.androidbegin.absfragtabhost;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View.OnClickListener;



public class FragmentTab1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment1, container, false);
    return rootView;
}

public class Activity extends ActionBarActivity {

    TextView firstName;
    EditText editTextName;

    TextView textView5;
    EditText editTextSurname;

    TextView textView4;
    EditText editTextMobile;

    TextView textView2;
    EditText editTextEmail;

    TextView textView3;
    EditText editTextAddress1;

    TextView textView6;
    EditText editTextAddress2;

    MyDBHandler dbHandler;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        firstName = (TextView) findViewById(R.id.firstName);
        editTextName = (EditText) findViewById(R.id.editTextName);
        textView5 = (TextView) findViewById(R.id.textView5);
        editTextSurname = (EditText) findViewById(R.id.editTextSurname);
        textView4 = (TextView) findViewById(R.id.textView4);
        editTextMobile = (EditText) findViewById(R.id.editTextMobile);
        textView2 = (TextView) findViewById(R.id.textView2);
        editTextEmail = (EditText) findViewById(R.id.editTextEmail);
        textView3 = (TextView) findViewById(R.id.textView3);
        editTextAddress1 = (EditText) findViewById(R.id.editTextAddress1);
        textView6 = (TextView) findViewById(R.id.textView6);
        editTextAddress2 = (EditText) findViewById(R.id.editTextAddress2);

        dbHandler = new MyDBHandler(this, null, null, 1);
        //printDatabase();
    }


    //Add details to the database
    public void addButtonClicked(View view) {
        Details details = new Details("");
        details.setFirstname(editTextName.getText().toString());
        details.setSurname(editTextSurname.getText().toString());
        details.setPhone(editTextMobile.getText().toString());
        details.setEmail(editTextEmail.getText().toString());
        details.setAddress1(editTextAddress1.getText().toString());
        details.setAddress2(editTextAddress2.getText().toString());
        dbHandler.addDetails(details);
        //printDatabase();
    }
}
}

Fragment1.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:context=".MainActivity" >

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="600dp"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:theme="@style/AppTheme"
    android:touchscreenBlocksFocus="false">


    <!-- First name -->

    <TextView
        android:id="@+id/firstName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/editTextName"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:text="@string/firstname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editTextName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="5dp"
        android:layout_marginStart="82dp"
        android:layout_marginLeft="90dp"
        android:ems="10"
        android:paddingTop="25dp"
        android:inputType="text" >
    </EditText>



    <!-- Surname -->

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/address2"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_marginTop="33dp"
        android:layout_below="@+id/editTextAddress1"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <EditText
        android:id="@+id/editTextAddress2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="text"
        android:layout_alignTop="@+id/textView6"
        android:layout_alignLeft="@+id/editTextAddress1"
        android:layout_alignStart="@+id/editTextAddress1" />




    <!-- Mobile Number -->

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/editTextSurname"
        android:layout_alignLeft="@+id/firstName"
        android:layout_alignStart="@+id/firstName"
        android:text="@string/surname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editTextSurname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editTextMobile"
        android:layout_alignStart="@+id/editTextMobile"
        android:layout_below="@+id/editTextName"
        android:layout_marginTop="22dp"
        android:ems="10"
        android:inputType="text" />





    <!-- Email Address -->


    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/editTextEmail"
        android:layout_alignLeft="@+id/firstName"
        android:layout_alignStart="@+id/firstName"
        android:text="@string/email"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:inputType="textEmailAddress" />

    <EditText
        android:id="@+id/editTextEmail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/editTextMobile"
        android:layout_alignLeft="@+id/editTextMobile"
        android:layout_below="@+id/editTextMobile"
        android:layout_marginTop="22dp"
        android:ems="10"
        android:inputType="textEmailAddress" />



    <!-- Address 1 -->

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editTextAddress1"
        android:layout_alignBottom="@+id/editTextAddress1"
        android:layout_alignParentLeft="true"
        android:layout_toLeftOf="@+id/editTextEmail"
        android:text="@string/address1"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editTextAddress1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/editTextName"
        android:layout_alignEnd="@+id/editTextName"
        android:layout_below="@+id/editTextEmail"
        android:layout_marginTop="30dp"
        android:ems="10"
        android:inputType="text" />




    <!-- Address 2 -->

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/editTextEmail"
        android:layout_alignLeft="@+id/textView5"
        android:layout_alignStart="@+id/textView5"
        android:text="@string/phone"
        android:textAppearance="?android:attr/textAppearanceMedium" />


    <EditText
        android:id="@+id/editTextMobile"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editTextName"
        android:layout_alignStart="@+id/editTextName"
        android:layout_below="@+id/editTextSurname"
        android:layout_marginTop="22dp"
        android:ems="10"
        android:inputType="phone">
    </EditText>




    <Button
        android:id="@+id/addButtonClicked"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="addButtonClicked"
        android:text="@string/save"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />


    <!-- <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/change"
        android:layout_below="@+id/editTextAddress2"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="30dp"
        android:onClick="onBtnClicked"/> -->


</RelativeLayout>
</ScrollView>

MainActivity

package com.androidbegin.absfragtabhost;

import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.app.Activity;

public class MainActivity extends Activity {
// Declare Tab Variable
ActionBar.Tab Tab1, Tab2, Tab3;
Fragment fragmentTab1 = new FragmentTab1();
Fragment fragmentTab2 = new FragmentTab2();
Fragment fragmentTab3 = new FragmentTab3();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ActionBar actionBar = getActionBar();

    // Hide Actionbar Icon
    actionBar.setDisplayShowHomeEnabled(false);

    // Hide Actionbar Title
    actionBar.setDisplayShowTitleEnabled(false);

    // Create Actionbar Tabs
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Set Tab Icon and Titles
    Tab1 = actionBar.newTab().setIcon(R.drawable.tab1);
    Tab2 = actionBar.newTab().setText("Tab2");
    Tab3 = actionBar.newTab().setText("Tab3");

    // Set Tab Listeners
    Tab1.setTabListener(new TabListener(fragmentTab1));
    Tab2.setTabListener(new TabListener(fragmentTab2));
    Tab3.setTabListener(new TabListener(fragmentTab3));

    // Add tabs to actionbar
    actionBar.addTab(Tab1);
    actionBar.addTab(Tab2);
    actionBar.addTab(Tab3);
}
}

1条回答
劳资没心，怎么记你
2楼-- · 2019-08-29 01:59

The trace says: "Could not find a method addButtonClicked(View) in the activity class com.androidbegin.absfragtabhost.MainActivity for onClick handler on view class android.widget.Button with id 'addButtonClicked'"

The method needs to be in the activity class not in the fragment, either put it in there or use a onClickListener instead (which is what I would do)

Like this:

Button addButtonClicked = (Button)rootView.findViewById(R.id.addButtonClicked);
addButtonClicked.setOnClickListener(new OnClickListener(){
            public void onClick(View v) 
            {
                addButtonClicked(v); //(you dont need this parameter though)
            }
});
查看更多
0人赞 添加讨论(0) 举报
登录 后发表回答
相关问题
查看全部
相关文章
查看全部
收藏的人(6)