我有4个活动，有4个班级＆amp; xml布局;我想在4活动之间滑动!! 我使用其他帖子中的代码（本帖：Fling gesture detection on grid layout）
我想要在触摸leftToright或rightToleft滑动时打开新活动。
我的代码在哪里错了：
我的代码：
package com.package110.Y;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
public class ActivitySwipeDetectorActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// how to set this 3 line to in my code Or change or update it
//ActivitySwipeDetector activitySwipeDetector = new ActivitySwipeDetector(this);
//lowestLayout = (RelativeLayout)this.findViewById(R.id.lowestLayout);
//lowestLayout.setOnTouchListener(activitySwipeDetector);
}
public class ActivitySwipeDetector implements View.OnTouchListener {
Intent left = new Intent(getApplicationContext(), left.class);
Intent right = new Intent(getApplicationContext(), right.class);
Intent top = new Intent(getApplicationContext(), top.class);
Intent bottom = new Intent(getApplicationContext(), bottom.class);
static final String logTag = "ActivitySwipeDetector";
private Activity activity;
static final int MIN_DISTANCE = 100;
private float downX, downY, upX, upY;
public ActivitySwipeDetector(Activity activity){
this.activity = activity;
}
public void onRightToLeftSwipe(){
Log.i(logTag, "RightToLeftSwipe!");
activity.startActivity(right);
}
public void onLeftToRightSwipe(){
Log.i(logTag, "LeftToRightSwipe!");
activity.startActivity(left);
}
public void onTopToBottomSwipe(){
Log.i(logTag, "onTopToBottomSwipe!");
activity.startActivity(top);
}
public void onBottomToTopSwipe(){
Log.i(logTag, "onBottomToTopSwipe!");
activity.startActivity(bottom);
}
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()){
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
return true;
}
case MotionEvent.ACTION_UP: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
// swipe horizontal?
if(Math.abs(deltaX) > MIN_DISTANCE){
// left or right
if(deltaX < 0) { this.onLeftToRightSwipe(); return true; }
if(deltaX > 0) { this.onRightToLeftSwipe(); return true; }
}
else {
Log.i(logTag, "Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE);
return false; // We don't consume the event
}
// swipe vertical?
if(Math.abs(deltaY) > MIN_DISTANCE){
// top or down
if(deltaY < 0) { this.onTopToBottomSwipe(); return true; }
if(deltaY > 0) { this.onBottomToTopSwipe(); return true; }
}
else {
Log.i(logTag, "Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE);
return false; // We don't consume the event
}
return true;
}
}
return false;
}
}
}
解释： 我的应用程序是强制关闭！ 我的谷歌API是为Android 3.0;它对我的应用程序有问题吗？ 而且我也尝试这个代码，它强行关闭!!!!
另一个代码：
package ir.package110.Y;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
public class ActivitySwipeDetectorActivity extends Activity {
private GestureDetector gestureDetector;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// ...
gestureDetector = new GestureDetector(new SwipeGestureDetector());
}
/* ... */
Intent right = new Intent(ActivitySwipeDetectorActivity.this.getBaseContext(), right.class);
Intent left = new Intent(ActivitySwipeDetectorActivity.this.getBaseContext(), left.class);
private void onLeftSwipe() {
// Do something
startActivity(left);
}
private void onRightSwipe() {
startActivity(right);
// Do something
}
// Private class for gestures
private class SwipeGestureDetector extends SimpleOnGestureListener {
// Swipe properties, you can change it to make the swipe
// longer or shorter and speed
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 200;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
float diffAbs = Math.abs(e1.getY() - e2.getY());
float diff = e1.getX() - e2.getX();
if (diffAbs > SWIPE_MAX_OFF_PATH)
return false;
// Left swipe
if (diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
ActivitySwipeDetectorActivity.this.onLeftSwipe();
// Right swipe
} else if (-diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
ActivitySwipeDetectorActivity.this.onRightSwipe();
}
} catch (Exception e) {
Log.e("YourActivity", "Error on gestures");
}
return false;
}
}
}
答案 0 :(得分：1)
我认为最好的方法是使用ViewPager一个Activity和4个片段。
您可以查看有关片段的链接： http://androidcookbook.com/Recipe.seam;jsessionid=A2DD7A11C804B7C7646DCA883AA452FC?recipeId=1160
关于ViewPager的这个： http://developer.android.com/reference/android/support/v4/view/ViewPager.html
答案 1 :(得分：0)
你应该使用Fragment s。它使导航更加清洁。
Fragment在Activity内运行，可以像Activity一样查看和运行！
这是一些代码。
Activity举行Fragment s
（标签和ActionBar可隐藏）
public class Activity extends FragmentActivity implements ActionBar.TabListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
setTheme(R.style.ScoreBoardStyles);
super.onCreate(savedInstanceState);
setContentView(R.layout.view_pager);
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setCustomView(t)
.setTabListener(this));
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
Fragment fragment = null;
if (position == 0) {
fragment = new FirstFragment();
}
if (position == 1) {
fragment = new SecondFragment();
}
if (position == 2) {
fragment = new ThirdFragment();
}
if (position == 3) {
fragment = new FourthFragment();
}
return fragment;
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
case 3:
return getString(R.string.title_section4).toUpperCase(l);
}
return null;
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_layout, container, false);
return rootView;
}
}
}
Fragment
public class FirstFragment extends Fragment {
public ScoreFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.first_layout, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// YOUR CODE HERE
}
}
如果您使用的是AndroidStudio！
TabbedActivity（选择向下的导航方式）然后创建Fragment s
Fragment并选择Fragment类型在此Activity课程中设置布局
@Override
public Fragment getItem(int position) {
Fragment fragment = null;
if (position == 0) {
fragment = new FirstFragment();
}
if (position == 1) {
fragment = new SecondFragment();
}
if (position == 2) {
fragment = new ThirdFragment();
}
if (position == 3) {
fragment = new FourthFragment();
}
return fragment;
}
希望有所帮助！