OnClickListener无效 [英] OnClickListener won't work

问题描述

我的OnClickListener出现问题，找不到我的错误！ 我尝试使用片段，这些片段来自fragment_app_launch.xml 我尝试使用Toast来测试是否调用了OnClickListener，但似乎没有！

I got a problem with my OnClickListener and can't find my mistake! I tried to use fragments, the view they come from fragment_app_launch.xml I tried to use a Toast to test whether the OnClickListener is called, but it seems its not!

package com.pthuermer.juraquiz;

import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBar.Tab;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class ActivityAppLaunch extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_app_launch);

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment())
                .commit();
    }

    ActionBar actionbar = getSupportActionBar();
    actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    actionbar.setTitle(R.string.app_name);

    ActionBar.Tab fragTab1 = actionbar.newTab().setText(R.string.tabBar_1);
    Fragment fragmentQuiz = new FragmentAppLaunch();
    fragTab1.setTabListener(new TabListener(fragmentQuiz));
    actionbar.addTab(fragTab1);

    ActionBar.Tab fragTab2 = actionbar.newTab().setText(R.string.tabBar_2);
    Fragment fragmentStatistics = new FragmentStatistics();
    fragTab2.setTabListener(new TabListener(fragmentStatistics));
    actionbar.addTab(fragTab2);

    ActionBar.Tab fragTab3 = actionbar.newTab().setText(R.string.tabBar_3);
    Fragment fragmentProVersion = new FragmentProVersion();
    fragTab3.setTabListener(new TabListener(fragmentProVersion));
    actionbar.addTab(fragTab3);

    ActionBar.Tab fragTab4 = actionbar.newTab().setText(R.string.tabBar_4);
    Fragment fragmentInfo = new FragmentInfo();
    fragTab4.setTabListener(new TabListener(fragmentInfo));
    actionbar.addTab(fragTab4);

    ActionBar.Tab fragTab5 = actionbar.newTab().setText(R.string.tabBar_5);
    Fragment fragmentSettings = new FragmentSettings();
    fragTab5.setTabListener(new TabListener(fragmentSettings));
    actionbar.addTab(fragTab5);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.app_launch, 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();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

/**
 * A placeholder fragment containing a simple view.
 */
public static class PlaceholderFragment extends Fragment {

    private Button btn_q_c_1;
    private Button btn_q_c_2;
    private Button btn_q_c_3;
    private Button btn_q_c_4;

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_app_launch, container, false);

        btn_q_c_1 = (Button)rootView.findViewById(R.id.btn_q_c_1);
        btn_q_c_1.setOnClickListener(btn_q_c_listener);
        btn_q_c_2 = (Button)rootView.findViewById(R.id.btn_q_c_2);
        btn_q_c_2.setOnClickListener(btn_q_c_listener);
        btn_q_c_3 = (Button)rootView.findViewById(R.id.btn_q_c_3);
        btn_q_c_3.setOnClickListener(btn_q_c_listener);
        btn_q_c_4 = (Button)rootView.findViewById(R.id.btn_q_c_4);
        btn_q_c_4.setOnClickListener(btn_q_c_listener);

        return rootView;

    }

    private OnClickListener btn_q_c_listener = new OnClickListener() {

        @Override
        public void onClick(View v) {

            Toast.makeText(getActivity(), "TESTTOAST", Toast.LENGTH_LONG).show();

            if (v == btn_q_c_1) {
                Globals.setQUESTION_CAT(1);
                startActivity(new Intent(getActivity(), ActivityQuiz.class));
            }
            else if (v == btn_q_c_2) {
                Globals.setQUESTION_CAT(2);
                startActivity(new Intent(getActivity(), ActivityQuiz.class));

            }
            else if (v == btn_q_c_3) {
                Globals.setQUESTION_CAT(3);
                startActivity(new Intent(getActivity(), ActivityQuiz.class));

            }
            else if (v == btn_q_c_4) {
                Globals.setQUESTION_CAT(0);
                startActivity(new Intent(getActivity(), ActivityQuiz.class));
            }
            else {
                // Log
            }

        }

    };

}

class TabListener implements ActionBar.TabListener {

    private Fragment fragment;

    public TabListener(Fragment fragment) {
        this.fragment = fragment;
    }

    @Override
    public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {

        // TODO Auto-generated method stub
        ft.replace(R.id.container, this.fragment);

    }

    @Override
    public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
        // TODO Auto-generated method stub

    }

}

}

xml

<RelativeLayout 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:background="#edf8ff"
tools:context="com.pthuermer.juraquiz.AppLaunch$PlaceholderFragment" >

<TextView
    android:id="@+id/tv_heading_app_launch"
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="@string/heading_app_launch"
    android:textSize="20sp"
    android:gravity="center"
    android:background="#ffffff" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/tv_heading_app_launch"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_q_c_1"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="@string/btn_q_c_1" />

    <Button
        android:id="@+id/btn_q_c_2"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="@string/btn_q_c_2" />

    <Button
        android:id="@+id/btn_q_c_3"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="@string/btn_q_c_3" />

    <Button
        android:id="@+id/btn_q_c_4"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="@string/btn_q_c_4" />

</LinearLayout>

推荐答案

尝试以下代码:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_app_launch, container, false);

    return rootView;

}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    OnClickListener btn_q_c_listener = new OnClickListener() {

    @Override
    public void onClick(View v) {

        Toast.makeText(getActivity(), "TESTTOAST", Toast.LENGTH_LONG).show();

        if (v == btn_q_c_1) {
            Globals.setQUESTION_CAT(1);
            startActivity(new Intent(getActivity(), ActivityQuiz.class));
        }
        else if (v == btn_q_c_2) {
            Globals.setQUESTION_CAT(2);
            startActivity(new Intent(getActivity(), ActivityQuiz.class));

        }
        else if (v == btn_q_c_3) {
            Globals.setQUESTION_CAT(3);
            startActivity(new Intent(getActivity(), ActivityQuiz.class));

        }
        else if (v == btn_q_c_4) {
            Globals.setQUESTION_CAT(0);
            startActivity(new Intent(getActivity(), ActivityQuiz.class));
        }
        else {
            // Log
        }
    };

    btn_q_c_1 = (Button)getView().findViewById(R.id.btn_q_c_1);
    btn_q_c_1.setOnClickListener(btn_q_c_listener);
    btn_q_c_2 = (Button)getView().findViewById(R.id.btn_q_c_2);
    btn_q_c_2.setOnClickListener(btn_q_c_listener);
    btn_q_c_3 = (Button)getView().findViewById(R.id.btn_q_c_3);
    btn_q_c_3.setOnClickListener(btn_q_c_listener);
    btn_q_c_4 = (Button)getView().findViewById(R.id.btn_q_c_4);
    btn_q_c_4.setOnClickListener(btn_q_c_listener);
}

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