我如何能显示图片的全尺寸？ [英] How can I show the full size of Image?
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问题描述
我是新来的，新的编程机器人。我发现这个例子（下面的例子）在互联网网站，这是一个伟大的教程！当我一旦点击图片上的GridView的我想显示图像的全尺寸什么我想要实现的。
公共类MainActivity延伸活动{
公共类ImageAdapter扩展了BaseAdapter {
私人语境mContext;
ArrayList的＆LT;字符串＆GT; ITEMLIST =新的ArrayList＆LT;字符串＆GT;（）;
公共ImageAdapter（上下文C）{
mContext = C;
}
空加（字符串路径）{
itemList.add（路径）;
}
@覆盖
公众诠释getCount将（）{
返回itemList.size（）;
}
@覆盖
公共对象的getItem（INT为arg0）{
// TODO自动生成方法存根
返回null;
}
@覆盖
众长getItemId（INT位置）{
// TODO自动生成方法存根
返回0;
}
@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
如果（convertView == NULL）{//如果它不回收，初始化一些
//属性
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（220，220））;
imageView.setScaleType（ImageView.ScaleType.CENTER_CROP）;
imageView.setPadding（8,8，8,8）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
位图BM =去codeSampledBitmapFromUri（itemList.get（位置），220，
220）;
imageView.setImageBitmap（BM）;
返回ImageView的;
}
公共位图德codeSampledBitmapFromUri（字符串路径，诠释reqWidth，
INT reqHeight）{
位图BM = NULL;
//第一代code与inJustDe codeBounds = true来检查尺寸
最后BitmapFactory.Options选项=新BitmapFactory.Options（）;
options.inJustDe codeBounds = TRUE;
BitmapFactory.de codeFILE（路径选择）;
//计算inSampleSize
options.inSampleSize = calculateInSampleSize（选项，reqWidth，
reqHeight）;
与inSampleSize集//德code位图
options.inJustDe codeBounds = FALSE;
BM = BitmapFactory.de codeFILE（路径选择）;
返回BM;
}
公众诠释calculateInSampleSize（
BitmapFactory.Options选项，INT reqWidth，诠释reqHeight）{
//原始高度和宽度的图像
最终诠释身高= options.outHeight;
最终诠释宽度= options.outWidth;
INT inSampleSize = 1;
如果（高度＆GT; reqHeight ||宽度GT; reqWidth）{
如果（宽＆GT;高度）{
inSampleSize = Math.round（（浮点）高度
/（浮点）reqHeight）;
} 其他 {
inSampleSize = Math.round（（浮点）宽/（浮点）reqWidth）;
}
}
返回inSampleSize;
}
}
ImageAdapter myImageAdapter;
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
GridView控件的GridView =（GridView控件）findViewById（R.id.gridview）;
myImageAdapter =新ImageAdapter（本）;
gridview.setAdapter（myImageAdapter）;
字符串ExternalStorageDirectoryPath =环境
.getExternalStorageDirectory（）getAbsolutePath（）。
字符串TARGETPATH = ExternalStorageDirectoryPath +/测试/;
Toast.makeText（getApplicationContext（），TARGETPATH，Toast.LENGTH_LONG）
。显示（）;
文件targetDirector =新的文件（TARGETPATH）;
文件[]文件= targetDirector.listFiles（）;
对于（文件文件：文件）{
myImageAdapter.add（file.getAbsolutePath（））;
}
}
}
解决方案
通过图像的其他活动，以显示它在众目睽睽之下。
从您的主要活动传递的图像。使用下面的code：
gridview.setOnItemClickListener（新OnItemClickListener（）{
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V，
INT位置，长的id）{
ImageView的IMG = ia.getView（位置，V，父母）;
img.buildDrawingCache（）;
位图BMAP = img.getDrawingCache（）;
意向意图=新的意图（HelloGridView.this，
Imageviewer.class）;
束束=新包（）;
//bundle.putParcelable("image，BMAP）;
字符串面值= myimageadpter.getpath（位置）;
bundle.putParcelable（的ImagePath，标准杆）;
intent.putExtras（包）;
startActivityForResult（意向，0）;
}
}）;
在其他活动中使用这种code，显示传递的图像：
捆绑包= this.getIntent（）getExtras（）。
BMP = bundle.getParcelable（图像）;
ImageView的IMG =（ImageView的）findViewById（R.id.imageView1）;
D =新BitmapDrawable（BMP）;
img.setImageBitmap（BMP）;
如果您通过路径。第二项活动是这样的：
捆绑包= this.getIntent（）getExtras（）。
字符串s = bundle.getParcelable（的ImagePath）;
位图Imagefrompath = BitmapFactory.de codeFILE（S）;
ImageView的IMG =（ImageView的）findViewById（R.id.imageView1）;
img.setImageBitmap（Imagefrompath）;
I'm new here and new in programming Android. I found this example (below is the example) on a site in internet, It's a great tutorial! What do I want to achieve is when once I clicked a picture on the GridView I want to show the full size of the Image.
public class MainActivity extends Activity {
public class ImageAdapter extends BaseAdapter {
private Context mContext;
ArrayList<String> itemList = new ArrayList<String>();
public ImageAdapter(Context c) {
mContext = c;
}
void add(String path) {
itemList.add(path);
}
@Override
public int getCount() {
return itemList.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(220, 220));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220,
220);
imageView.setImageBitmap(bm);
return imageView;
}
public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth,
int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float) height
/ (float) reqHeight);
} else {
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
return inSampleSize;
}
}
ImageAdapter myImageAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridview = (GridView) findViewById(R.id.gridview);
myImageAdapter = new ImageAdapter(this);
gridview.setAdapter(myImageAdapter);
String ExternalStorageDirectoryPath = Environment
.getExternalStorageDirectory().getAbsolutePath();
String targetPath = ExternalStorageDirectoryPath + "/test/";
Toast.makeText(getApplicationContext(), targetPath, Toast.LENGTH_LONG)
.show();
File targetDirector = new File(targetPath);
File[] files = targetDirector.listFiles();
for (File file : files) {
myImageAdapter.add(file.getAbsolutePath());
}
}
}
解决方案
Pass the image to the other activity to show it in full view.
To pass the image from Your main Activity. USe following code:
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
ImageView img = ia.getView(position, v, parent);
img.buildDrawingCache();
Bitmap bmap = img.getDrawingCache();
Intent intent = new Intent(HelloGridView.this,
Imageviewer.class);
Bundle bundle = new Bundle();
//bundle.putParcelable("image", bmap);
String par=myimageadpter.getpath(position);
bundle.putParcelable("imagepath", par);
intent.putExtras(bundle);
startActivityForResult(intent, 0);
}
});
In other activity use this code to show the passed image:
Bundle bundle = this.getIntent().getExtras();
bmp=bundle.getParcelable("image");
ImageView img=(ImageView) findViewById(R.id.imageView1);
d =new BitmapDrawable(bmp);
img.setImageBitmap(bmp);
If you pass path. the second activity look like this:
Bundle bundle = this.getIntent().getExtras();
String s=bundle.getParcelable("imagepath");
Bitmap Imagefrompath = BitmapFactory.decodeFile(s);
ImageView img=(ImageView) findViewById(R.id.imageView1);
img.setImageBitmap(Imagefrompath );
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