Question

所以我有3个actionBar标签运行3个不同的片段类。在actionBar的Tab1中，我有一个用户填写的简单表单，然后将数据保存在SQLite数据库中，这个表单和在其上执行的任务本身可以很好地作为项目工作，但是当我尝试将其集成为一个片段（FragmentTab1），然后单击保存按钮时应用程序崩溃。关于它为什么会崩溃的任何想法？我想我可能不得不实现一个onClickListener，但不确定！我知道我使用标签和片段的方式有点过时，但我仍然希望以这种方式工作。

错误记录

        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);
}
}

Answer 1

跟踪说：“无法在活动类com.androidbegin.absfragtabhost.MainActivity中找到方法addButtonClicked（View），用于视图类android.widget.Button上的onClick处理程序，其id为”addButtonClicked“”

该方法需要在不在片段中的活动类中，要么放在那里，要么使用onClickListener（这就是我要做的）

像这样：

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)
            }
});

actionBar选项卡中的Android片段

1 个答案: