一部の画像をSDカードに保存するプロジェクトに取り組んでおり、この画像を表示するビューフローを作成する必要があります。私はsdCardからIDで画像を取得していますが、私の問題は異なる画像間をスワイプする方法です。ここに私が使用しているコードがあります:
import java.io.File;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
public class Cards extends Activity {
public Cursor cursor;
int position;
int indexxx;
Bitmap b;
int objectId;
int cardsId;
private ViewFlow viewFlow;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.circle_layout);
UserDatabaseHelper userDbHelper = new UserDatabaseHelper(this, null, 1);
userDbHelper.initialize(this);
final int cardId = getIntent().getIntExtra("card_id",0);
Log.i("Card Id ","Card Id : "+cardId);
final int collId = getIntent().getIntExtra("collection_id",0);
Log.i("Collection Id ","Collection Id : "+collId);
position = getIntent().getIntExtra("position",0);
Log.i("position","position : "+position);
String cardSQL = "SELECT cm.objectId "+
"FROM cardmedias AS cm "+
"INNER JOIN cards AS cd "+
"ON (cm.cardId = cd.objectId) "+
"WHERE cd.collectionId="+collId;
Cursor cards = userDbHelper.executeSQLQuery(cardSQL);
if (cards.getCount() == 0) {
Log.i("", "No Image file");
cards.close();
} else if (cards.getCount() > 0) {
for (cards.move(0); cards.moveToNext(); cards.isAfterLast()) {
cardsId = Integer.parseInt(cards.getString(cards
.getColumnIndex("objectId")));
Log.i("", "cards objectId : " + cardsId);
String path = Environment.getExternalStorageDirectory()
+ "/.Stampii/MediaCard/" + cardsId + ".png";
Log.i("", "path : " + path);
}
}
String sql = "SELECT objectId FROM cardmedias WHERE cardId=" + cardId
+ " LIMIT 1";
Cursor cursor = userDbHelper.executeSQLQuery(sql);
if (cursor.getCount() == 0) {
Log.i("", "No Image file");
cursor.close();
} else if (cursor.getCount() > 0) {
for (cursor.move(0); cursor.moveToNext(); cursor.isAfterLast()) {
objectId = Integer.parseInt(cursor.getString(cursor
.getColumnIndex("objectId")));
Log.i("", "objectId : " + objectId);
}
}
Button info = (Button) findViewById(R.id.info_button);
info.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Cards.this, SingleCardInfo.class);
intent.putExtra("card_id", cardId);
intent.putExtra("collection_id", collId);
startActivity(intent);
}
});
Button back = (Button) findViewById(R.id.back_button);
back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
final ArrayList<Bitmap> images = new ArrayList<Bitmap>();
String path = Environment.getExternalStorageDirectory()+"/.Stampii/MediaCard/"+objectId+".png";
BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = new byte[16*1024];
Bitmap b = BitmapFactory.decodeFile(path, options);
images.add(b);
viewFlow = (ViewFlow) findViewById(R.id.viewflow);
viewFlow.setAdapter(new ImageAdapter(this, images),position);
ImageButton prevBtn = (ImageButton) findViewById(R.id.previous_button);
prevBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
indexxx = viewFlow.getSelectedItemPosition()-1;
if (indexxx>=0) {
viewFlow.setAdapter(new ImageAdapter(Cards.this, images),indexxx);
viewFlow.setSelectedItemPosition(indexxx);
Log.i("indexxx", "indexxx : " + indexxx);
}
}
});
ImageButton nextBtn = (ImageButton) findViewById(R.id.next_button);
nextBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
indexxx = viewFlow.getSelectedItemPosition()+1;
if (indexxx<=images.size()) {
viewFlow.setAdapter(new ImageAdapter(Cards.this, images),indexxx);
viewFlow.setSelectedItemPosition(indexxx);
Log.i("indexxx", "indexxx : " + indexxx);
}
}
});
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
viewFlow.onConfigurationChanged(newConfig);
}
}
そして、ここに私の ImageAdapter クラスがあります:
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private ArrayList<Bitmap> ids = new ArrayList<Bitmap>();
private Bitmap bitmap;
public ImageAdapter(Context context, ArrayList<Bitmap> images) {
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ids = images;
}
@Override
public int getCount() {
return 1;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.image_item, null);
}
((ImageView) convertView.findViewById(R.id.imgView)).setImageBitmap(ids.get(position));
return convertView;
}
}
データベースからIDを取得し、その名前の画像を見つけてビューフローとスワイプに追加することで、次または前の画像を設定する方法を考えてください。私の代わりに誰かにコードを書いてほしくありません... どうすればこれを行うことができるかという考えに固執しています... したがって、誰かが提案、アイデア、または何か他のことで私を助けることができれば、それを撃ってください.
前もって感謝します！