使用Gallery畫廊讀取sdcard裡的圖片 - Android 台灣中文網

ArrayList<HashMap<String, String>> al = new ArrayList<HashMap<String, String>>();
HashMap<String, String> map = new HashMap<String, String>();
map.put("image", "/sdcard/........")
al.add(map);

複製代碼

public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
super.onCreateContextMenu(menu, v, menuInfo);
menu.add(0,Upload,0,"上傳");
menu.add(0,Delete,0,"刪除");
}
@Override
public boolean onContextItemSelected(final MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case Upload:
Intent intent = new Intent();
intent.setClass(PreviewPhoto.this, upload.class);
startActivity(intent);
break;
case Delete:
new AlertDialog.Builder(PreviewPhoto.this)
.setTitle("刪除照片")
.setMessage("確定要刪除照片 ")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
})
.setCancelable(false)
.show();
break;
}
return super.onContextItemSelected(item);
}

複製代碼

public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.previewphoto);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, //全屏顯示
WindowManager.LayoutParams.FLAG_FULLSCREEN);
ImageList=getSD();
list = ImageList.toArray(new String[ImageList.size()]);
//設定Switcher
mSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher);
mSwitcher.setFactory((ViewFactory) this);
//設定載入Switcher的模式
mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_in_left));
//設定輸出Switcher的模式
mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_out_right));
final Gallery previewphoto = (Gallery) findViewById(R.id.gallery);
//新增ImageAdapter並設定给Gallery
previewphoto.setAdapter(new ImageAdapter(this,getSD()));
previewphoto.setOnItemSelectedListener(this);
//設定一個itemclickListener事件
previewphoto.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent,
View v, int position, long id)
{
int pos = position+1;
Toast.makeText(PreviewPhoto.this, "第"+pos+"張照片", Toast.LENGTH_SHORT).show();
}
});
}

複製代碼

private List<String> getSD()
{
String PhotoFile;
/* 設定目前所在路徑 */
List<String> it=new ArrayList<String>();
File f=new File(PhotoFile); //SDcard路徑
File[] files=f.listFiles();
/* 將所有文件存入ArrayList中 */
for(int i=0;i<files.length;i++)
{
file=files[i];
if(getImageFile(file.getPath()))
it.add(file.getPath());
}
return it;
}
private boolean getImageFile(String fName)
{
boolean re;
// 取得擴展名
String end=fName.substring(fName.lastIndexOf(".")+1,
fName.length()).toLowerCase();
// 按擴展名的類型决定MimeType
if(end.equals("jpg")||end.equals("gif")||end.equals("png")
||end.equals("jpeg")||end.equals("bmp"))
{
re=true;
}
else
{
re=false;
}
return re;
}
//改寫BaseAdapter自定義一ImageAdapter class
public class ImageAdapter extends BaseAdapter
{
int mGalleryItemBackground;
private Context mContext;
private List<String> lis;
public ImageAdapter(Context c,List<String> li)
{
mContext = c;
lis=li;
/* 使用res/values/attrs.xml中的<declare-styleable>定義
* 的Gallery属性.*/
TypedArray a = obtainStyledAttributes(R.styleable.A_Gallery);
//取得Gallery属性的Index id
mGalleryItemBackground = a.getResourceId(
R.styleable.A_Gallery_android_galleryItemBackground, 0);
//讓對象的styleable属性能夠反覆使用
a.recycle();
}
public int getCount()
{
return lis.size();
}
public Object getItem(int position)
{
return position;
}
public long getItemId(int position)
{
return position;
}
public View getView(final int position, View convertView,
ViewGroup parent)
{
//產生ImageView
ImageView imageview = new ImageView(mContext);
//設定圖片给imageView
Bitmap bm = BitmapFactory.decodeFile(lis.get(position).toString());
imageview.setImageBitmap(bm);
//重新設定圖片的寬高
imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
//重新設定Layout的寬高
imageview.setLayoutParams(new Gallery.LayoutParams(150,100));
imageview.setBackgroundResource(mGalleryItemBackground);
//設定Gallery背景圖
//傳回imageView
final Gallery gallery = (Gallery)findViewById(R.id.gallery);
gallery.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
registerForContextMenu(gallery);
notifyDataSetChanged();
file_name = lis.get(position);
return false;
}
});
return imageview;
}
}
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
String photoURL=list[position];
Log.i("A",String.valueOf(position));
mSwitcher.setImageURI(Uri.parse(photoURL));
}
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
public View makeView() {
ImageView imageview = new ImageView(PreviewPhoto.this);
imageview.setBackgroundColor(0xFF000000);
imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageview.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
return imageview;
}

複製代碼