I am new to coding and never worked with it before! I am working on wallpaper application were I created the gallery . I managed to do this , but I want to modify the app so that when user click on specific image It allow them to set as wallpaper. I need some help with this! (Sorry for bad English)
Does anyone know how I should do this? Really thankful for help
Following are my code...
MainActivity .java
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class GalleryDemoActivity extends Activity {
private ImageView selectedImageView;
private ImageView leftArrowImageView;
private ImageView rightArrowImageView;
private Gallery gallery;
private int selectedImagePosition = 0;
private List<Drawable> drawables;
private GalleryImageAdapter galImageAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getDrawablesList();
setupUI();
}
private void setupUI() {
selectedImageView = (ImageView) findViewById(R.id.selected_imageview);
leftArrowImageView = (ImageView) findViewById(R.id.left_arrow_imageview);
rightArrowImageView = (ImageView) findViewById(R.id.right_arrow_imageview);
gallery = (Gallery) findViewById(R.id.gallery);
leftArrowImageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (selectedImagePosition > 0) {
--selectedImagePosition;
}
gallery.setSelection(selectedImagePosition, false);
}
});
rightArrowImageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (selectedImagePosition < drawables.size() - 1) {
++selectedImagePosition;
}
gallery.setSelection(selectedImagePosition, false);
}
});
gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
selectedImagePosition = pos;
if (selectedImagePosition > 0 && selectedImagePosition < drawables.size() - 1) {
leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
} else if (selectedImagePosition == 0) {
leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
} else if (selectedImagePosition == drawables.size() - 1) {
rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
}
changeBorderForSelectedImage(selectedImagePosition);
setSelectedImage(selectedImagePosition);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
galImageAdapter = new GalleryImageAdapter(this, drawables);
gallery.setAdapter(galImageAdapter);
if (drawables.size() > 0) {
gallery.setSelection(selectedImagePosition, false);
}
if (drawables.size() == 1) {
rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
}
}
private void changeBorderForSelectedImage(int selectedItemPos) {
int count = gallery.getChildCount();
for (int i = 0; i < count; i++) {
ImageView imageView = (ImageView) gallery.getChildAt(i);
imageView.setBackgroundDrawable(getResources().getDrawable(R.drawable.image_border));
imageView.setPadding(3, 3, 3, 3);
}
ImageView imageView = (ImageView) gallery.getSelectedView();
imageView.setBackgroundDrawable(getResources().getDrawable(R.drawable.selected_image_border));
imageView.setPadding(3, 3, 3, 3);
}
private void getDrawablesList() {
drawables = new ArrayList<Drawable>();
drawables.add(getResources().getDrawable(R.drawable.natureimage1));
drawables.add(getResources().getDrawable(R.drawable.natureimage2));
drawables.add(getResources().getDrawable(R.drawable.natureimage3));
drawables.add(getResources().getDrawable(R.drawable.natureimage4));
drawables.add(getResources().getDrawable(R.drawable.natureimage5));
drawables.add(getResources().getDrawable(R.drawable.natureimage6));
drawables.add(getResources().getDrawable(R.drawable.natureimage7));
drawables.add(getResources().getDrawable(R.drawable.natureimage8));
drawables.add(getResources().getDrawable(R.drawable.natureimage9));
drawables.add(getResources().getDrawable(R.drawable.natureimage10));
drawables.add(getResources().getDrawable(R.drawable.natureimage11));
drawables.add(getResources().getDrawable(R.drawable.natureimage12));
drawables.add(getResources().getDrawable(R.drawable.natureimage13));
drawables.add(getResources().getDrawable(R.drawable.natureimage14));
drawables.add(getResources().getDrawable(R.drawable.natureimage15));
}
private void setSelectedImage(int selectedImagePosition) {
BitmapDrawable bd = (BitmapDrawable) drawables.get(selectedImagePosition);
Bitmap b = Bitmap.createScaledBitmap(bd.getBitmap(), (int) (bd.getIntrinsicHeight() * 0.9), (int) (bd.getIntrinsicWidth() * 0.7), false);
selectedImageView.setImageBitmap(b);
selectedImageView.setScaleType(ScaleType.FIT_XY);
}
}
GalleryAdapter. java
import java.util.List;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
public class GalleryImageAdapter extends BaseAdapter {
private Activity context;
private static ImageView imageView;
private List<Drawable> plotsImages;
private static ViewHolder holder;
public GalleryImageAdapter(Activity context, List<Drawable> plotsImages) {
this.context = context;
this.plotsImages = plotsImages;
}
@Override
public int getCount() {
return plotsImages.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
holder = new ViewHolder();
imageView = new ImageView(this.context);
imageView.setPadding(3, 3, 3, 3);
convertView = imageView;
holder.imageView = imageView;
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.imageView.setImageDrawable(plotsImages.get(position));
holder.imageView.setScaleType(ImageView.ScaleType.FIT_XY);
holder.imageView.setLayoutParams(new Gallery.LayoutParams(150, 90));
return imageView;
}
private static class ViewHolder {
ImageView imageView;
}
}
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical" >
<ImageView
android:id="@+id/selected_imageview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/gallery_relative_layout"
android:layout_marginLeft="30dip"
android:layout_marginRight="30dip"
android:layout_marginTop="30dip" />
<RelativeLayout
android:id="@+id/gallery_relative_layout"
android:layout_width="fill_parent"
android:layout_height="150dip"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >
<ImageView
android:id="@+id/left_arrow_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="15dip"
android:src="@drawable/arrow_left_disabled" />
<Gallery
android:id="@+id/gallery"
android:layout_width="0dip"
android:layout_height="150dip"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:layout_toLeftOf="@+id/right_arrow_imageview"
android:layout_toRightOf="@+id/left_arrow_imageview"
android:spacing="20dip" />
<ImageView
android:id="@+id/right_arrow_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="15dip"
android:src="@drawable/arrow_right_enabled" />
</RelativeLayout>
</RelativeLayout>
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gallerydemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".GalleryDemoActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
