我想在网格视图中实现水平滑动，以便一张幻灯片显示9张图片，下一张幻灯片显示其他9张图片，依此类推。这里的图片来自SD卡。请任何人帮帮忙.. !!
答案 0 :(得分：0)
package flipper.view;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Display;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewFlipper;
public class NewflipperActivity extends Activity implements OnClickListener,OnTouchListener{
ViewFlipper flip;
Animation animFlipInForeward;
Animation animFlipOutForeward;
Animation animFlipInBackward;
Animation animFlipOutBackward;
int filepos=0;
int y;
private GestureDetector gestureDetector;
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
RelativeLayout rl1,rl2;
TextView tv1,tv2;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Display dip=getWindowManager().getDefaultDisplay();
int width=dip.getWidth();
int actualheight=dip.getHeight();
System.out.println("width is--->"+width);
System.out.println("height is--->"+actualheight);
int layoutheight=(actualheight)/8;
int flipheight=6*layoutheight;
RelativeLayout.LayoutParams params1=new RelativeLayout.LayoutParams(width,layoutheight-30);
params1.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
tv1=(TextView)findViewById(R.id.textView1);
tv1.setLayoutParams(params1);
RelativeLayout.LayoutParams params2=new RelativeLayout.LayoutParams(width,layoutheight-30);
params2.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
tv2=(TextView)findViewById(R.id.textView2);
tv2.setLayoutParams(params2);
gestureDetector = new GestureDetector(new MyGestureDetector());
flip=(ViewFlipper)findViewById(R.id.viewFlipper1);
flip.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return false;
}
return true;
}
});
LinearLayout mylay=(LinearLayout)findViewById(R.id.linearlay);
LinearLayout.LayoutParams layparam=new LinearLayout.LayoutParams(width,flipheight);
mylay.setLayoutParams(layparam);
animFlipInForeward = AnimationUtils.loadAnimation(this, R.anim.flipin);
animFlipOutForeward = AnimationUtils.loadAnimation(this, R.anim.flipout);
animFlipInBackward = AnimationUtils.loadAnimation(this, R.anim.flipin_reverse);
animFlipOutBackward = AnimationUtils.loadAnimation(this, R.anim.flipout_reverse);
String folderpath=Environment.getExternalStorageDirectory()+"/New Folder/";
File filepath=new File(folderpath);
File[] mylist=filepath.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
// TODO Auto-generated method stub
return (filename.toLowerCase().endsWith(".jpg")||filename.toLowerCase().endsWith(".png")||filename.toLowerCase().endsWith(".jpeg"));
}
});
Arrays.sort(mylist);
int folderlength=mylist.length;
int mylength=folderlength/9;
if(folderlength%9==0)
{
y=mylength;
}
else
{
y=(mylength)+1;
}
for(int i=0;i<y;i++)
{System.out.println("abc"+i);
TableLayout mtable=new TableLayout(this);
TableLayout.LayoutParams myparams=new TableLayout.LayoutParams(width,flipheight);
mtable.setLayoutParams(myparams);
mtable.setWeightSum(3);
mtable.setOnTouchListener(NewflipperActivity.this);
for(int j=0;j<3;j++)
{
TableRow mrow=new TableRow(this);
mrow.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
mrow.setOnTouchListener(NewflipperActivity.this);
for(int k=0;k<3;k++)
{
if(filepos<folderlength)
{
Log.i("displaying","image at file pos"+mylist[filepos]);
final ImageView imageView = new ImageView(this);
Bitmap imgBitmap,b1;
try
{
if(mylist[filepos].length()>1500){
BitmapFactory.Options bounds = new BitmapFactory.Options();
bounds.inSampleSize = 4;
imgBitmap = BitmapFactory.decodeFile(mylist[filepos] + "",bounds);
b1=Bitmap.createScaledBitmap(imgBitmap, ((int)(width/3))-20, ((int)(flipheight/3))-20, true);
}
else
{
imgBitmap=BitmapFactory.decodeFile(mylist[filepos] + "");
b1=Bitmap.createScaledBitmap(imgBitmap, ((int)(width/3))-20,((int)(flipheight/3))-20, true);
}
imageView.setImageBitmap(b1);
imageView.setAdjustViewBounds(true);
imageView.setPadding(10,10,10,10);
imageView.setTag(mylist[filepos]+"");
imageView.setOnTouchListener(NewflipperActivity.this);
imageView.setOnClickListener(NewflipperActivity.this);
// final String imagename=mylist[filepos].getName();
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
mrow.addView(imageView);
filepos++;
}
}
mtable.addView(mrow);
}
flip.addView(mtable);
}
}
private void SwipeRight(){
flip.setInAnimation(animFlipInBackward);
flip.setOutAnimation(animFlipOutBackward);
flip.showPrevious();
}
private void SwipeLeft(){
flip.setInAnimation(animFlipInForeward);
flip.setOutAnimation(animFlipOutForeward);
flip.showNext();
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(NewflipperActivity.this, "Left Swipe", Toast.LENGTH_SHORT).show();
SwipeLeft();
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(NewflipperActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
SwipeRight();
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ImageView imagename1 = (ImageView)v;
String imgName = (String) imagename1.getTag();
Toast.makeText(NewflipperActivity.this, "clicked on image-->"+imgName, Toast.LENGTH_SHORT).show();
Log.e("displaying","clicked onimage::::::"+imgName);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
}