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java - 共享首选项中的 Collection 按钮 Android

转载 作者:太空狗 更新时间:2023-10-29 16:14:03 25 4
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我正在制作一个食谱应用程序,想创建一个 Collection 夹按钮,用户将在其中单击灰色星形按钮,它将变为黄色星形按钮(我有一张灰色星形和黄色星形的图片), 单击主屏幕上的 Collection 夹链接后,所选 Collection 夹将显示在列表中

我在布局中有以下代码

 <ImageButton android:id="@+id/favouritebtn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:src="@drawable/staroff"
android:background="#00ffffff"
android:onClick="onToggleStar"
android:clickable="true"/>

谁能帮我写代码,当我点击星星时它会变成黄色并添加到 Collection 夹

更新

FavouriteBtn.java

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;

public class FavouriteBtn extends Activity {


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

final ImageButton imgButton =(ImageButton)findViewById(R.id.favbtn);
imgButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
boolean isFavourite = readState();

if (isFavourite) {
imgButton.setBackgroundResource(R.drawable.staroff);
isFavourite = false;
saveState(isFavourite);

} else {
imgButton.setBackgroundResource(R.drawable.staron);
isFavourite = true;
saveState(isFavourite);

}

}
});

}

private void saveState(boolean isFavourite) {
SharedPreferences aSharedPreferences = this.getSharedPreferences(
"Favourite", Context.MODE_PRIVATE);
SharedPreferences.Editor aSharedPreferencesEdit = aSharedPreferences
.edit();
aSharedPreferencesEdit.putBoolean("State", isFavourite);
aSharedPreferencesEdit.commit();
}

private boolean readState() {
SharedPreferences aSharedPreferences = this.getSharedPreferences(
"Favourite", Context.MODE_PRIVATE);
return aSharedPreferences.getBoolean("State", true);
}

}

食谱.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" >

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/iv_detail"
android:layout_marginTop="5dp"
android:text="Recipe"
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:layout_alignParentLeft="true"
android:layout_below="@+id/textView2"
android:layout_marginTop="2dp"
android:text="TextView"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="italic" />

<TextView
android:id="@+id/tvFavourite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add To Favourites (click star)"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:layout_above="@+id/tvName"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />


<ImageButton
android:id="@+id/favbtn"
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/staroff"
android:background="#00ffffff"
android:onClick="onClick"
android:clickable="true"/>

<TextView
android:id="@+id/tvTD"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Ingredients"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textStyle="bold"
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="TextView"
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="Preparation"
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="TextView"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="italic" />
</LinearLayout>
</ScrollView>

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