Trying to set a simple animation of the change of fragments. When placing the xml - animation files in the / anim / folder / throws an exception:

Caused by: java.lang.RuntimeException: Unknown animation name: objectAnimator

If you place the animation files in the / animator / folder, the setCustomAnimation () method scolds and says that the animation resource from the / anim / folder is needed. Tell me how you still need to make it work.

File R.anim.slide_in_left.xml:

  <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <objectAnimator android:duration="1500" android:interpolator="@android:anim/accelerate_decelerate_interpolator" android:propertyName="y" android:valueFrom="-1280" android:valueTo="0" android:valueType="floatType"/> </set>

File R.anim.slide_in_right.xml:

 <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <objectAnimator android:duration="300" android:interpolator="@android:anim/accelerate_interpolator" android:propertyName="alpha" android:valueTo="0" android:valueType="floatType"/> <objectAnimator android:duration="1500" android:interpolator="@android:anim/accelerate_decelerate_interpolator" android:propertyName="x" android:valueFrom="0" android:valueTo="1280" android:valueType="floatType"/> </set>

The mainActivity.java file:

 import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { Fragment1 f1; Fragment2 f2; FragmentTransaction fm; @Override protected void onCreate( Bundle savedInstanceState ) { super.onCreate( savedInstanceState ); setContentView( R.layout.activity_main ); f1 = new Fragment1(); f2 = new Fragment2(); fm = getSupportFragmentManager().beginTransaction(); fm.setCustomAnimations( R.anim.slide_in_left, R.anim.slide_in_right ); fm.replace( R.id.fragCont, f1 ); fm.addToBackStack( null ); fm.commit(); Button btn = ( Button ) findViewById( R.id.btn ); btn.setOnClickListener( new View.OnClickListener() { @Override public void onClick( View v ) { fm = getSupportFragmentManager().beginTransaction(); fm.setCustomAnimations( R.anim.slide_in_left, R.anim.slide_in_right ); if ( f1.isVisible() ) { fm.replace( R.id.fragCont, f2 ); } else { fm.replace( R.id.fragCont, f1 ); } fm.commit(); } } ); } }

    1 answer 1

    Apparently, FragmentTransaction from the support library (android.support.v4.app.FragmentTransaction) works only with resources from the anim directory, starting with version Android 3.1 XML, animation resources should be placed in the animator directory with which android.support.v4 does not work .app. FragmentTransaction. To work with these resources, you must use the standard android.app.FragmentTransaction. I changed the classes of fragments to android.app. * And it all worked.