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我有一個位圖圖像數組加載使用哈里斯捲曲頁庫在https://github.com/harism/android_page_curl找到。我需要將縮放與手勢集成到每個位圖圖像上。我怎樣才能實現手勢放大。任何人都可以幫助我解決我面臨的一個核心問題。放大位圖圖像畫布與手勢android
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lp = this;
util = new Utils();
if (getLastNonConfigurationInstance() != null) {
index = (Integer) getLastNonConfigurationInstance();
}
mCurlView = (CurlView) findViewById(R.id.curl);
mCurlView.setPageProvider(new PageProvider());
mCurlView.setSizeChangedObserver(new SizeChangedObserver());
mCurlView.setCurrentIndex(index);
// mCurlView.setBackgroundResource(R.drawable.icon);
imHome = (ImageView)findViewById(R.id.imHome);
imHome.setClickable(true);
imHome.setOnClickListener(lp);
btOne=(Button)findViewById(R.id.btOne);
btTwo=(Button)findViewById(R.id.btTwo);
btThree=(Button)findViewById(R.id.btThree);
btFour=(Button)findViewById(R.id.btFour);
llPageOne = (LinearLayout)findViewById(R.id.llPageOne);
btOne.setOnClickListener(this);
btTwo.setOnClickListener(this);
btThree.setOnClickListener(this);
btFour.setOnClickListener(this);
// This is something somewhat experimental. Before uncommenting next
// line, please see method comments in CurlView.
// mCurlView.setEnableTouchPressure(true);
}
@Override
public void onPause() {
super.onPause();
mCurlView.onPause();
}
@Override
public void onResume() {
super.onResume();
mCurlView.onResume();
}
@Override
public Object onRetainNonConfigurationInstance() {
return mCurlView.getCurrentIndex();
}
/**
* Bitmap provider.
*/
private class PageProvider implements CurlView.PageProvider {
// Bitmap resources.
private int[] mBitmapIds = {
R.drawable.luxury,R.drawable.luxury1,R.drawable.luxury_two
};
@Override
public int getPageCount() {
//return 5;
int pagesCount = 0;
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int wwidth = displaymetrics.widthPixels;
int hheight = displaymetrics.heightPixels;
if(wwidth > hheight){
if((mBitmapIds.length % 2) > 0)
pagesCount = (mBitmapIds.length/2) + 1;
else
pagesCount = mBitmapIds.length/2;
}else{
pagesCount = mBitmapIds.length;
}
System.out.println("page count "+pagesCount);
return pagesCount;
}
private Bitmap loadBitmap(int width, int height, int index) {
Bitmap b = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
b.eraseColor(0xFFFFFFFF);
Canvas c = new Canvas(b);
Drawable d = getResources().getDrawable(mBitmapIds[index]);
System.out.println("canvas width: "+c.getWidth());
int margin = 3;//7
int border = 3;//2
Rect r = new Rect(margin, margin, width - margin, height - margin);
int imageWidth = r.width() - (border * 2);
int imageHeight = imageWidth * d.getIntrinsicHeight()
/d.getIntrinsicWidth();
if (imageHeight > r.height() - (border * 2)) {
imageHeight = r.height() - (border * 2);
imageWidth = imageHeight * d.getIntrinsicWidth()
/d.getIntrinsicHeight();
}
Log.d("TAG", String.valueOf(imageHeight));
if (lp.getWindow().getWindowManager().getDefaultDisplay()
.getOrientation() == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
// portrait mode
r.left += ((r.width() - imageWidth)/2) - border;
r.right = r.left + imageWidth + border + border;
} else if (lp.getWindow().getWindowManager().getDefaultDisplay()
.getOrientation() == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
// landscape
r.left += ((r.width() - imageWidth)) - border-122;
r.right = r.left + imageWidth + border + border+122;
}
r.top += ((r.height() - imageHeight)/2) - border;
r.bottom = r.top + imageHeight + border + border;
Paint p = new Paint();
p.setColor(0xFFC0C0C0);
c.drawRect(r, p);
r.left += border;
r.right -= border;
r.top += border;
r.bottom -= border;
d.setBounds(r);
d.draw(c);
return b;
}
@Override
public void updatePage(CurlPage page, int width, int height, int index) {
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int wwidth = displaymetrics.widthPixels;
int hheight = displaymetrics.heightPixels;
if(wwidth > hheight){
System.out.println("index "+(index*2));
System.out.println("index2 "+(index*2)+1);
System.out.println("case landscape orientation...");
if (index >0){
front = loadBitmap(width, height, (index*2));
back = loadBitmap(width, height, (index*2)+1);
}else {
front = loadBitmap(width, height, (index));
back = loadBitmap(width, height, (index));
}
System.out.println("MyActivity.onCreate debug message "+String.valueOf(index));
Matrix matrix = new Matrix();
matrix.preScale(-1.0f, 1.0f);
Bitmap mirroredBitmap = Bitmap.createBitmap(back, 0, 0, back.getWidth(), back.getHeight(), matrix, false);
page.setTexture(front, CurlPage.SIDE_FRONT);
page.setTexture(mirroredBitmap, CurlPage.SIDE_BACK);
// if (mCurlView.getCurrentIndex()==0){
//
// showPage1();
//
// }else {
//
// hidePage1();
// }
System.out.println("mCurlView.getCurrentIndex() "+mCurlView.getCurrentIndex());
}else{
System.out.println("case portrait orientation...");
Bitmap front = loadBitmap(width, height, index);
Bitmap back = loadBitmap(width, height, index);
System.out.println("MyActivity.onCreate debug message "+String.valueOf(index));
page.setTexture(front, CurlPage.SIDE_FRONT);
page.setTexture(back, CurlPage.SIDE_BACK);
}
}
}
/**
* CurlView size changed observer.
*/
private class SizeChangedObserver implements CurlView.SizeChangedObserver {
@Override
public void onSizeChanged(int w, int h) {
if (w > h) {
mCurlView.setViewMode(CurlView.SHOW_TWO_PAGES);
mCurlView.setMargins(.000f, .000f, .000f, .000f);
} else {
mCurlView.setViewMode(CurlView.SHOW_ONE_PAGE);
mCurlView.setMargins(.005f, .005f, .00f, .00f);
}
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.btOne:
util.sendUri(this, "http://google.com/");
break;
case R.id.btTwo:
util.sendUri(this, "http://google.com/");
break;
case R.id.btThree:
util.sendUri(this, "http://google.com/");
break;
case R.id.btFour:
util.sendUri(this, "http://google.com/");
break;
case R.id.imHome:
mCurlView.setCurrentIndex(0);
System.out.println("home pressed");
mCurlView.onResume();
break;
}
}
public void showPage1(){
llPageOne.setVisibility(View.VISIBLE);
}
public void hidePage1(){
llPageOne.setVisibility(View.GONE);
}
// @Override
// public void onBackPressed() {
// // TODO Auto-generated method stub
//
// startActivity (new Intent (this,MyActivityMenuActivity.class));
// }
//
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.drop_list, menu);
return super.onCreateOptionsMenu(menu);
}
/**
* Override function onOptionsItemSelected(MenuItem item)
* Identify the item
* Call super class's onOptionsItemSelected(MenuItem item)
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId()==R.id.menu_option_one){
startActivity (new Intent (this,ContactForm.class));
}
return super.onOptionsItemSelected(item);
}
你能否給我提供一個例子 – Dimitri
這個職位[圖片縮放/平移內的圖庫]（http://stackoverflow.com/questions/5011994/image-zooming-panning-inside -of-a-gallery/5013418＃5013418] - 可以幫助你 – yushulx
如何根據縮放比例繪製位圖 – Dimitri