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我正在使用android中的自動播放片段幻燈片動畫。動畫效果很好。我有5個滑動的碎片。一旦第二個片段完成滑動，我想隱藏第一個片段。我寫了下面的代碼，但第一個片段沒有隱藏。請指導我，如果有什麼我必須改變。如何在幻燈片動畫中隱藏片段
我的第二個要求是我想擁有Decelerate_Accelerate_Interpolator。我見過幾個java實現，如https://gist.github.com/NashLegend/5f51e5dc537f470f4384。但我想在xml文件中添加插值器參考。我不認爲我可以以編程方式操作我的ObjectAnimator。正如我在Fragment中爲setCustomAnimations方法傳遞此slide_in一樣。
Slide_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:valueFrom="1"
android:valueTo="0"
android:valueType="floatType"
android:propertyName="XFraction"
android:duration="1600"
/>
</set>
我的活動課
public class TestUIActivity extends FragmentActivity {
private final String TAG ="TestUIActivity";
Fragment fragment = new ClinicloudGreyFragment();
int currentPage = 0, TIME_DELAY=1600, REPEAT =500;
boolean stop = false;
Timer swipeTimer = null;
private final Handler mHandler = new Handler();
//MyPagerAdapter mAdapter = new MyPagerAdapter(getSupportFragmentManager());
//ViewPager mPager = null;
Runnable update = new Runnable() {
@Override
public void run() {
if(currentPage == getCount()) {
stop = true;
currentPage = getCount()-1;
if(mHandler != null) {
mHandler.removeCallbacks(update);
}
}
if(!stop) {
if(currentPage == 1) {
TIME_DELAY=1600;
REPEAT=500;
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(R.anim.slideinwithhalfasecdelay, R.anim.slideout);
//ft.hide(fragment);
//fragment = new ClinicloudPurpleFragment();
ft.replace(R.id.topPanel, new ClinicloudPurpleFragment());
ft.commit();
} else if (currentPage == 2) {
TIME_DELAY=1600;
REPEAT=500;
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.hide(fragment);
//fragment = new ClinicloudOrangeFragment();
ft.setCustomAnimations(R.anim.slideinwithasecdelay,R.anim.slideout);
ft.replace(R.id.topPanel, new ClinicloudOrangeFragment());
ft.commit();
} else if (currentPage == 3) {
TIME_DELAY=1400;
REPEAT=400;
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.hide(fragment);
ft.setCustomAnimations(R.anim.slideinwithoneandhalfasecdelay, R.anim.slideout);
ft.replace(R.id.topPanel, new ClinicloudYellowFragment());
ft.commit();
} else if (currentPage == 4) {
TIME_DELAY = 1200;
REPEAT=400;
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.hide(fragment);
ft.setCustomAnimations(R.anim.slideinwithtwosecdelay,R.anim.slideout);
ft.replace(R.id.topPanel, new ClinicloudBlueFragment());
ft.commit();
}
currentPage++;
}
}
};
public int getCount() {
return 5;
}
我的動態XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/topPanel"
android:name="com.clinicloud.app.ClinicloudGreyFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="76.4">
</fragment>
<fragment
android:id="@+id/bottomPanel"
android:name="com.clinicloud.app.ClinicloudBottonFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="23.6">
</fragment>
</LinearLayout>
的意見後，我修改了Activity類像下面。
public class TestUIActivity extends FragmentActivity {
private final String TAG ="TestUIActivity";
Fragment fragment = new ClinicloudGreyFragment();
int currentPage = 0, TIME_DELAY=1600, REPEAT =500;
boolean stop = false;
Timer swipeTimer = null;
private final Handler mHandler = new Handler();
//MyPagerAdapter mAdapter = new MyPagerAdapter(getSupportFragmentManager());
//ViewPager mPager = null;
Runnable update = new Runnable() {
@Override
public void run() {
if(currentPage == getCount()) {
stop = true;
currentPage = getCount()-1;
if(mHandler != null) {
mHandler.removeCallbacks(update);
}
}
if(!stop) {
if(currentPage == 1) {
TIME_DELAY=1600;
REPEAT=500;
FragmentTransaction ftTop = getFragmentManager().beginTransaction();
ftTop.setCustomAnimations(R.anim.slideinwithhalfasecdelay, R.anim.slideout);
//ft.hide(fragment);
//fragment = new ClinicloudPurpleFragment();
ClinicloudPurpleFragment clinicloudPurpleFragment = ClinicloudPurpleFragment.newInstance();
ftTop.replace(R.id.topPanel, clinicloudPurpleFragment, "Purple Fragment");
ftTop.commit();
} else if (currentPage == 2) {
TIME_DELAY=1600;
REPEAT=500;
FragmentTransaction ftTop = getFragmentManager().beginTransaction();
ftTop.setCustomAnimations(R.anim.slideinwithasecdelay, R.anim.slideout);
// FragmentTransaction ft = getFragmentManager().beginTransaction();
ftTop.hide(getFragmentManager().findFragmentByTag("GreyFragment"));
//fragment = new ClinicloudOrangeFragment();
ClinicloudOrangeFragment clinicloudOrangeFragment = ClinicloudOrangeFragment.newInstance();
ftTop.replace(R.id.topPanel, clinicloudOrangeFragment, "Orange Fragment");
ftTop.commit();
} else if (currentPage == 3) {
TIME_DELAY=1400;
REPEAT=400;
FragmentTransaction ftTop = getFragmentManager().beginTransaction();
ftTop.setCustomAnimations(R.anim.slideinwithoneandhalfasecdelay, R.anim.slideout);
ftTop.hide(getFragmentManager().findFragmentByTag("GreyFragment"));
ClinicloudYellowFragment clinicloudYellowFragment = ClinicloudYellowFragment.newInstance();
ftTop.replace(R.id.topPanel, clinicloudYellowFragment, "Yellow Fragment");
ftTop.commit();
} else if (currentPage == 4) {
TIME_DELAY = 1200;
REPEAT=400;
FragmentTransaction ftTop = getFragmentManager().beginTransaction();
ftTop.setCustomAnimations(R.anim.slideinwithtwosecdelay, R.anim.slideout);
ftTop.hide(getFragmentManager().findFragmentByTag("GreyFragment"));
ClinicloudBlueFragment clinicloudBlueFragment = ClinicloudBlueFragment.newInstance();
ftTop.replace(R.id.topPanel, clinicloudBlueFragment,"Blue Fragment");
ftTop.commit();
}
currentPage++;
}
}
};
public int getCount() {
return 5;
}
我得到空指針異常
Process: com.clinicloud.app, PID: 25721
java.lang.NullPointerException
at android.app.BackStackRecord.run(BackStackRecord.java:658)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
檢查這個帖子http://stackoverflow.com/questions/4817900/android-fragments -and-animation http://stackoverflow.com/questions/13005 961/fragmenttransaction-animation-to-slide-in-over-top http://stackoverflow.com/questions/24179899/fragments-and-slide-over-animation –