android分页/手势换屏/实用源码

package com.yaomei.activity.info; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Intent; import android.content.pm.ResolveInfo; import android.database.Cursor; import android.os.Bundle; import android.view.GestureDetector; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.view.GestureDetector.OnGestureListener; import android.view.View.OnClickListener; import android.view.View.OnTouchListener; import android.widget.ViewFlipper; import com.yaomei.activity.adapter.AppsAdapter; import com.yaomei.activity.adapter.SimpleAdapterForPageList; import com.yaomei.dbHelper.sqliteHelperUtil; import com.yaomei.model.AppsModel; import com.yaomei.widget.gridViewExt; import com.yaomei.widget.pageList; import com.yaomei.widget.gridViewExt.TableRow; import com.yaomei.widget.pageList.onItemClickListener; public class infoActivity extends Activity implements OnGestureListener, OnTouchListener { private gridViewExt gridview; private List<ResolveInfo> mApps; private List<AppsModel> mAppsModel; private sqliteHelperUtil dbHelper; private AppsAdapter adapter; private SimpleAdapterForPageList simpleAdapter; private pageList page; private ViewFlipper viewFlipper; private int mCurrentLayoutState = 0; private static final int FLING_MIN_DISTANCE = 100; private static final int FLING_MIN_VELOCITY = 200; private GestureDetector mGestureDetector; private int pageIndxe = 0; int tableRowId = -1; int tableColumnId = -1; int RowCount = 0; int ColumnCountByRow = 0; int appCount = -1; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); dbHelper = new sqliteHelperUtil(this); loadApp(); findView(); // 注册一个用于手势识别的类 mGestureDetector = new GestureDetector(this); // 给mFlipper设置一个listener viewFlipper.setOnTouchListener(this); viewFlipper.setOnClickListener(new viewFlipperClickEvent()); mCurrentLayoutState = 0; // 允许长按住ViewFlipper,这样才能识别拖动等手势 viewFlipper.setLongClickable(true); init(); appCount = adapter.getCount(); } void findView() { page = (pageList) findViewById(R.id.myPage); viewFlipper = (ViewFlipper) findViewById(R.id.myFlipper); } void init() { simpleAdapter = new SimpleAdapterForPageList(this, dbHelper.getPage(), R.layout.page_text, new String[] { "num" }, new int[] { R.id.itemText }); int count = simpleAdapter.getCount(); page.setSimpleAdapter(simpleAdapter); adapter = new AppsAdapter(this, mAppsModel); page.setOnItemClick(new pageItemClickEvent()); mCurrentLayoutState = 0; for (int i = 0; i < count; i++) { gridview = new gridViewExt(getApplicationContext()); viewFlipper.addView(gridview); } gridViewExt grid = (gridViewExt) viewFlipper .getChildAt(mCurrentLayoutState); grid.setColumnCount(5); grid.setAdapter(adapter); } /** * 指定跳转到某个页面 * * @param switchTo */ public void switchLayoutStateTo(int switchTo) { while (mCurrentLayoutState != switchTo) { if (mCurrentLayoutState > switchTo) { mCurrentLayoutState--; viewFlipper.showPrevious(); } else { mCurrentLayoutState++; viewFlipper.showNext(); } } pageIndxe = mCurrentLayoutState; } /** * 加载应用程序 */ void loadApp() { Intent intent = new Intent(Intent.ACTION_MAIN, null); intent.addCategory(Intent.CATEGORY_LAUNCHER); mApps = getPackageManager().queryIntentActivities(intent, 0); checkAppIsRight(mApps); mAppsModel = new ArrayList<AppsModel>(); for (ResolveInfo info : mApps) { if (!info.activityInfo.packageName.equals(getPackageName())) { if (!dbHelper.isExistsByPackageName(info.activityInfo.name)) { AppsModel model = new AppsModel(); model.setActivity_Name(info.activityInfo.name); model.setPackage_Name(info.activityInfo.packageName); dbHelper.insertAppInfo(model); } } } loadPage(0, mApps); } /** * 加载分页数据 * * @param pageNum * @param info */ private void loadPage(final int pageNum, final List<ResolveInfo> info) { Cursor temp = dbHelper.queryPageById(pageNum); String packageName = ""; int count = temp.getCount(); for (int i = 0; i < count; i++) { temp.moveToPosition(i); packageName = temp.getString(1); for (ResolveInfo resolver : info) { if (resolver.activityInfo.name.equals(packageName)) { AppsModel appsModel = new AppsModel(); appsModel.setActivity_Icon(resolver .loadIcon(getPackageManager())); appsModel.setActivity_Name(resolver.activityInfo.name); appsModel.setPackage_Name(temp.getString(2)); appsModel.setActivity_text(resolver.activityInfo .loadLabel(getPackageManager())); mAppsModel.add(appsModel); } } } temp.close(); } /** * 验证系统应用程序是否数量小于数据库保存的数量，如果小于则删除不符合的数据 * * @param info */ private void checkAppIsRight(List<ResolveInfo> info) { int i = 0; if (dbHelper.getAllName() != null) { String[] packageNames = dbHelper.getAllName(); if (info.size() < dbHelper.getAppsCount()) { for (String packageName : packageNames) { for (ResolveInfo resolver : info) { if (packageName .equals(resolver.activityInfo.packageName)) { i++; } } if (i == 0) { dbHelper.deleteAppByPackageName(packageName); } } } } } @Override public boolean onDown(MotionEvent e) { // TODO Auto-generated method stub return false; } public class pageItemClickEvent implements onItemClickListener { @Override public void onItemClick(int position, View firstView) { pageIndxe = position; loadGrid(pageIndxe); switchLayoutStateTo(pageIndxe);// appCount = adapter.getCount(); tableRowId = -1; tableColumnId = -1; } } private void loadGrid(int pagePosition) { mAppsModel.clear(); loadPage(pagePosition, mApps); gridViewExt itemGrid = (gridViewExt) viewFlipper .getChildAt(pagePosition); itemGrid.setColumnCount(5); itemGrid.setAdapter(new AppsAdapter(infoActivity.this, mAppsModel)); } /** * 向左划动 */ private void loadPageByLeft() { if (pageIndxe < simpleAdapter.getCount() - 1) { pageIndxe++; loadGrid(pageIndxe); page.setCheckPage(pageIndxe);// viewFlipper.showNext();// mCurrentLayoutState = pageIndxe; } } /** * 向右划动 */ private void loadPageByRight() { if (pageIndxe > 0) { pageIndxe--; loadGrid(pageIndxe); page.setCheckPage(pageIndxe); viewFlipper.showPrevious(); mCurrentLayoutState = pageIndxe; } } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) { loadPageByLeft(); } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) { loadPageByRight(); } tableRowId = -1; tableColumnId = -1; appCount = adapter.getCount(); return false; } @Override public void onLongPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { // TODO Auto-generated method stub return false; } @Override public void onShowPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onSingleTapUp(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub return mGestureDetector.onTouchEvent(eve