在我的代码中我以编程方式动态创建imageview如何在我的代码中添加缩放功能？请帮助我，我想创建zooom功能，所以当用户点击图像放大，再次点击时，原始尺寸我该怎么办？
ScrollView scroll = new ScrollView(MainActivity1.this);
scroll.setLayoutParams(new
LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
btnLO = new LinearLayout(MainActivity1.this);
LinearLayout.LayoutParams paramsLO = new
LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
// button margins
paramsLO.setMargins(0, 0, 0, 0);
LinearLayout.LayoutParams paramsLO2 = new
LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// button margins
paramsLO2.setMargins(0, 20, 0, 0);
// button height/width *pixels*
btnLO.setOrientation(LinearLayout.VERTICAL);
btnLO.setBackgroundColor(5); // not working correctly
//buttons
for (i =0;i <reqdata.length;i++)
{
LinearLayout li=new LinearLayout(this);
li.setOrientation(LinearLayout.HORIZONTAL);
final Button b1 = new Button(MainActivity1.this);
final ImageView imageView = new ImageView(MainActivity1.this);
int width = 160;
int height = 50;
LinearLayout.LayoutParams parms = new
LinearLayout.LayoutParams(width,height);
parms.setMargins(0, 2, 0, 0);
imageView.setLayoutParams(parms);
li.addView(b1, paramsLO);
li.addView(imageView);
btnLO.addView(li);
b1.setText(reqdata[i].getSpinnerText());
b1.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
imageView1 = imageView;
Intent pictureActionIntent = new
Intent(MediaStore.ACTION_IMAGE_CAPTURE);
pictureActionIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new
File(SDCARD_ROOT_PATH + SAVE_PATH_IN_SDCARD,IMAGE_CAPTURE_NAME)));
startActivityForResult(pictureActionIntent,CAMERA_PICTURE);
b1.setClickable(false);
}
});
}
final Button b2 = new Button(MainActivity1.this);
b2.setText("Submit");
b2.setWidth(150);
b2.setHeight(50);
b2.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
long visitID = dbConnector.saveVisit();
for (i =0;i <reqdata.length;i++)
{
dbConnector.saveVisitDetail(listByte.get(i),visitID,Long.valueOf(reqdata[i].g
etValue()).longValue());
}
Toast.makeText(getBaseContext(),
"Sucessful",Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity1.this,
Main.class);
startActivity(intent);
finish();
}
});
btnLO.addView(b2, paramsLO2);
btnLO.setGravity(Gravity.CENTER| Gravity.CENTER_HORIZONTAL);
scroll.addView(btnLO);
this.addContentView(scroll, new LayoutParams());
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent
imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
if (imageReturnedIntent.getExtras() != null)
{
// here is the image from camera
yourSelectedImage = (Bitmap)
imageReturnedIntent.getExtras().get("data");
ByteArrayOutputStream outStr = new
ByteArrayOutputStream();
yourSelectedImage.compress(CompressFormat.JPEG, 100, outStr);
blob = outStr.toByteArray();
yourSelectedImage =
BitmapFactory.decodeByteArray(blob, 0, blob.length);
imageView1.setImageBitmap(yourSelectedImage);
listByte.add(blob);
}