如何设置onClick on imageview以在另一个layout.xml上设置backgroundresource即使我关闭应用程序然后再次打开它,另一个layout.xml上的backgroundresource是我点击的imageview吗?
这是我的代码,内容我想成为后台的图像
public class Main2Activity extends BaseAdapter {
private List<Item> items = new ArrayList<Item>();
private LayoutInflater inflater;
public Main2Activity(Context context) {
inflater = LayoutInflater.from(context);
items.add(new Item("Cindvia", R.drawable.cindvia));
items.add(new Item("Harugon", R.drawable.harugon));
items.add(new Item("Melodist", R.drawable.melodist));
items.add(new Item("Nabilaholic", R.drawable.nabilaholic));
items.add(new Item("Nat", R.drawable.nat));
items.add(new Item("Rona", R.drawable.rona));
items.add(new Item("Shanju", R.drawable.shanju));
items.add(new Item("Shinta", R.drawable.shinta_n));
items.add(new Item("Ve", R.drawable.ve));
items.add(new Item("Vienny", R.drawable.vienny));
}
@Override
public int getCount() {
return items.size();
}
@Override
public Object getItem(int i) {
return items.get(i);
}
@Override
public long getItemId(int i) {
return items.get(i).drawableId;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
View v = view;
ImageView picture;
TextView name;
if(v == null) {
v = inflater.inflate(R.layout.activity_main, viewGroup, false);
v.setTag(R.id.picture, v.findViewById(R.id.picture));
v.setTag(R.id.text, v.findViewById(R.id.text));
}
picture = (ImageView)v.getTag(R.id.picture);
name = (TextView)v.getTag(R.id.text);
Item item = (Item)getItem(i);
picture.setImageResource(item.drawableId);
name.setText(item.name);
return v;
}
private class Item {
final String name;
final int drawableId;
Item(String name, int drawableId) {
this.name = name;
this.drawableId = drawableId;
}
}
}
这是我想要更改背景的.XML代码
<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"
tools:context=".Main2Activity"
android:background="@drawable/nat" >
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="17dp"
android:shadowColor="#ffb4b4"
android:shadowDx="2"
android:shadowDy="2"
android:shadowRadius="3"
android:text="@string/eee_dd_mm_yyyy"
android:textColor="#ffffff"
android:textSize="17sp" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView2"
android:layout_centerHorizontal="true"
android:shadowColor="#ffb4b4"
android:shadowDx="2"
android:shadowDy="2"
android:shadowRadius="4"
android:text="@string/hh_mm_ss"
android:textColor="#ffffff"
android:textSize="37sp" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="40sp"
android:layout_height="40sp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="17dp"
android:layout_marginRight="17dp"
android:src="@drawable/info"
android:contentDescription="@string/todo"/>
它是一个下载我所有工作区的链接,我的意思是我正在使用的代码,
如果您想下载点击文件并下载
https://drive.google.com/file/d/0B7NPhjxHR4zbT2NaUDBRNnU4cWc/edit?usp=sharing
答案 0 :(得分:1)
也许您应该创建一个SharedPreference
来将最后ImageView
点击设置为新背景。当您的应用程序打开时,您应该像这样使用首选项:
SharedPreferences myPrefs = this.
getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
drawableid = myPrefs.getInt("backgroundResourceId", defaultvalue);
yourlayout.setBackground(drawableid);
请参阅Google文档中的这个简单示例: Storage Options
请参阅此答案: Android: make background image changable
另请阅读: Changing background colour with SharedPreference in Android
更多信息:
How to use SharedPreferences in Android to store, fetch and edit values
SharedPreferences Documentation Android
示例强>
要创建SharedPreference
,您可以按照本教程,简单易懂:
Android User Session Management using Shared Preferences
这一个:Android SharedPreferences Example
这样做的方法
我不确定你要做什么,但它会是这样的:
在Adapter
中,设置OnClickListener
:
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
// It will be something like this, not sure:
picture.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// This is a Toast to see the position of the selected item.
Toast.makeText(getApplicationContext(), "You clicked on the image position: " + i,Toast.LENGTH_LONG).show();
// so get the Id with this position
int idToBackground = getItemId(position);
// put in SharedPreferences
SharedPreferences sp = getSharedPreferences("myApp", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putInt("NewBackground", idToBackground);
editor.commit();
}
});
return v;
}
另一种方式
在Activity
中,将适配器设置为GridView
后,您可以制作OnItemClickListener
:
gridView.setAdapter(adapter);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
// do some stuff with the selected image
// get the id
int idImage = v.getItemId(position);
// then put in SharedPref
SharedPreferences sp = getSharedPreferences("myApp", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putInt("NewBackground", idImage);
editor.commit();
}
});
编辑您的偏好:
SharedPreferences sp = getSharedPreferences("myApp", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putInt("NewBackground", yourDrawableValue);
editor.commit();
最后,得到它:
SharedPreferences sp = getSharedPreferences("myApp", Activity.MODE_PRIVATE);
int myNewIntValue = sp.getInt("NewBackground", 0);
编辑:
要了解上下文,您有以下解决方案:
按活动,使用ActivityName.this
按应用,使用getApplicationContext()
按查看,使用YourView.getContext()
如果您需要通用的内容,请在活动中添加public static thecontextvariable
并分配应用程序上下文。有了这个,您可以随时拨打YourActivity.thecontextvariable
希望这会有所帮助。