我正在开发一个android应用程序，我对这一切都很陌生，包括移动应用程序开发，所以我有几个问题。任何帮助将是惊人的!
1)是否可以在整个活动(包括操作栏)之间滑动?我不是说像viewPager那样在片段之间交换，我是说交换整个屏幕(就像iOS上的snapchat一样)。这可能吗?如果是这样，我该怎么做呢?
2)实现主/细节类型布局的最佳方式是什么?就像推特例如，如果我有推文的listView，当一个人点击一个它会带你详细查看那条特定的推文……会是什么?最好的方法是什么?我会有一个活动与列表视图和创建点击tweet后的第二个活动?或者我用碎片代替，一个一个用于列表视图，一个用于详细视图?3)是否有办法为每个片段设置不同的动作条?
非常感谢!!
是可以滑动:
OnTouchSwipeListener
import android.content.Context;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
private Context context;
/* (non-Javadoc)
* @see android.view.View.OnTouchListener#onTouch(android.view.View, android.view.MotionEvent)
*/
public boolean onTouch(final View view, final MotionEvent motionEvent) {
return gestureDetector.onTouchEvent(motionEvent);
}
/**
* Gets the gesture detector.
*
* @return the gesture detector
*/
public GestureDetector getGestureDetector(){
return gestureDetector;
}
/**
* Instantiates a new on swipe touch listener.
*
* @param context
* the context
*/
public OnSwipeTouchListener(Context context) {
super();
this.context = context;
gestureDetector = new GestureDetector(context, new GestureListener());
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
/* (non-Javadoc)
* @see android.view.GestureDetector.SimpleOnGestureListener#onDown(android.view.MotionEvent)
*/
@Override
public boolean onDown(MotionEvent e) {
return true;
}
/* (non-Javadoc)
* @see android.view.GestureDetector.SimpleOnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)
*/
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getRawY() - e1.getRawY();
float diffX = e2.getRawX() - e1.getRawX();
if ((Math.abs(diffX) - Math.abs(diffY)) > SWIPE_THRESHOLD) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
} else {
if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
}
} catch (Exception e) {
}
return result;
}
}
/**
* On swipe right.
*/
public void onSwipeRight() {
}
/**
* On swipe left.
*/
public void onSwipeLeft() {
}
/**
* On swipe top.
*/
public void onSwipeTop() {
}
/**
* On swipe bottom.
*/
public void onSwipeBottom() {
}
}
OnSwipeTouchListener onSwipeTouchListener = new OnSwipeTouchListener(Activity.this) {
@Override
public void onSwipeLeft() {
//your actions
}
};
Is it possible to swipe between entire activities (including action bar)?
不行，你只能用Fragments，不能用Activities。
What is the best way to implement a master/detail type layout?
你可以使用fragment并将其添加到当前布局中。另一个解决方案是创建一个具有布局的对话框。
Is there a way to have different action bars for every fragment?
只有活动可以有ActionBar，但你仍然可以通过使用布局创建自己的ActionBar并将其膨胀到片段。
除了@Mirek Rusin的回答
OnSwipeTouchListener.java:
import android.content.Context;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
public OnSwipeTouchListener (Context ctx){
gestureDetector = new GestureDetector(ctx, new GestureListener());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
result = true;
}
}
else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
result = true;
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
在你的活动上的用法:定义一个布局(线性或相对或任何东西，甚至工具栏或图像..)
yourLayout.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) {
public void onSwipeTop() {
Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
startActivity(new Intent(MyActivity.this,NewActivity.class));
finish();
}
public void onSwipeLeft() {
Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
}
public void onSwipeBottom() {
Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
}
});
实际上你可以在活动之间滑动。检查这个库。
也看看这个链接