Question

我正在做一个烹饪应用程序，我创建了一个最喜欢的按钮，似乎工作正常我点击它并改变颜色。我尝试创建一个吐司，当我点击按钮时，会有一条消息说出来

added to favourites

和

removed from favourites

我用于吐司的代码没有错误，应用程序运行完美但吐司没有出现

这是我用过的代码

Toast.java

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.Toast;

public class Favourite_Toast extends Activity {

private CheckBox fav;

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

public void addListenerOnChk() {

    fav = (CheckBox) findViewById(R.id.checkBox);

    fav.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            if (((CheckBox) v).isChecked()) {
                Toast.makeText(Favourite_Toast.this,
                        "Added to Favourites", Toast.LENGTH_LONG).show();
            }
        }
    });
}
}

favourite.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true"
    android:drawable="@drawable/heart_red" />
<item android:state_checked="false"
    android:drawable="@drawable/heart_grey" />
</selector>

recipe.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/jbsbackground2"
android:orientation="vertical" >

<ImageView
    android:id="@+id/iv_detail"
    android:layout_width="fill_parent"
    android:layout_height="150dp"
    android:scaleType="centerCrop"
    android:src="@drawable/barbecuedporkribs" />

<Button
    android:id="@+id/button1"
    android:layout_width="fill_parent"
    android:layout_height="10dp"
    android:layout_below="@+id/iv_detail"
    android:background="#3D3C3A" />

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/button1" >

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_below="@+id/scrollView1"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true">

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_marginTop="5dp"
            android:text="@string/textView2"
            android:layout_toLeftOf="@id/favourites"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tvName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/tvName"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textStyle="italic"
            android:layout_below="@+id/textView2"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />

        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/checkBox"
            android:button="@drawable/favourite"
            android:checked="false"
            android:layout_alignTop="@+id/textView2"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:layout_marginRight="46dp"
            android:layout_marginEnd="46dp"
            android:clickable="true" />

        <TextView
            android:id="@+id/tvTD"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/tvTD"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textStyle="bold"
            android:layout_below="@+id/checkBox"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />

        <TextView
            android:id="@+id/tvIngredients"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/tvTD"
            android:layout_marginTop="2dp"
            android:text="@string/tvIngredients"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textStyle="italic" />

        <TextView
            android:id="@+id/tvK"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/tvIngredients"
            android:layout_marginTop="5dp"
            android:text="@string/tvK"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tvPreparation"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/tvK"
            android:layout_marginTop="2dp"
            android:text="@string/tvPreparation"
            android:textColor="#000000"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textStyle="italic" />


    </RelativeLayout>
</ScrollView>

</RelativeLayout>

我已经使用了收藏夹按钮的复选框，这可能就是吐司不能正常工作的原因

也有人能够告诉我如何制作代码，这样一旦你点击了收藏夹按钮就会保持点击状态，因为它不会一直点击

提前致谢

Answer 1

我建议您使用OnClickListener更改OnCheckedChangeListener。当用户检查/取消选中CheckBox的状态时，它将被调用。恕我直言，它是这个小部件更好的倾听者。

Answer 2

尝试以下代码

if ((fav.isChecked()) { 
  Toast.makeText(Favourite_Toast.this, "Added to Favourites", Toast.LENGTH_LONG).show(); 
}
else{
  Toast.makeText(Favourite_Toast.this, "Removed From Favourites", Toast.LENGTH_LONG).show(); 
}

Answer 3

在MainActivity中使用此代码......这将解决您的问题：

public class MainActivity extends Activity {

    private CheckBox chk;

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

        chk = (CheckBox) findViewById(R.id.checkBox1);
        chk.setOnClickListener(checkboxClickListener);

    }

    View.OnClickListener checkboxClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            boolean checked = ((CheckBox) view).isChecked();
            if (checked) {
                Toast.makeText(MainActivity.this,"Added to favourite", Toast.LENGTH_LONG).show();
            }
            else {
                Toast.makeText(MainActivity.this,"Removed from favourite", Toast.LENGTH_LONG).show();
            }
        }
    };

}

用最喜欢的按钮Android敬酒

3 个答案: