android FragmentActivity以及Fragment的学习
FragmentActivity中有多个Fragment的效果，这里我们不用ViewPager
MainActivity的代码：
package com.example.fragmentdemo;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
private FragmentManager mFragmentManager;
private Fragment1 fragment1;
private Fragment2 fragment2;
private Button button1;
private FragmentTransaction fragmentTransaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//新建两个Fragment
fragment1 = new Fragment1();
fragment2 = new Fragment2();
mFragmentManager = getFragmentManager();
//Fragment事务
fragmentTransaction = mFragmentManager.beginTransaction();
//增加执行的动画效果 动画不能用我们的Tween动画，后面会有代码
fragmentTransaction.setCustomAnimations(R.anim.animation_view, R.anim.animation_view_exit);
//加入两个Fragment，两个Fragment放入FrameLayout中
fragmentTransaction.add(R.id.myFrameLayout, fragment1);
fragmentTransaction.add(R.id.myFrameLayout, fragment2);
//隐藏第二个先显示第一个
fragmentTransaction.hide(fragment2);
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragmentTransaction.commit();
button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(fragment2.isHidden()){
fragmentTransaction = mFragmentManager.beginTransaction();
//执行动画，隐藏fragment1，显示fragment2
fragmentTransaction.setCustomAnimations(R.anim.animation_view, R.anim.animation_view_exit);
fragmentTransaction.show(fragment2).hide(fragment1);
//一定要commit
fragmentTransaction.commit();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onResume() {
super.onResume();
Log.i("Fragment", "fragment1:" + fragment1.isAdded());
Log.i("Fragment", "fragment2:" + fragment2.isAdded());
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button1"
></Button>
<FrameLayout
android:id="@+id/myFrameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
</FrameLayout>
</LinearLayout>
Fragment显示的动画代码 ，代码中用的是ObjectAnimator
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<objectAnimator android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="0"
android:valueTo="1"
android:valueType="floatType"
android:propertyName="alpha"
android:duration="2000"/>
<objectAnimator android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="0.0"
android:valueTo="1.0"
android:valueType="floatType"
android:propertyName="scaleX"
android:duration="2000"/>
<objectAnimator android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="0.0"
android:valueTo="1.0"
android:valueType="floatType"
android:propertyName="scaleY"
android:duration="2000"/>
</set>Fragment隐藏时动画代码：
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<objectAnimator android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="1"
android:valueTo="0"
android:valueType="floatType"
android:propertyName="alpha"
android:duration="2000"/>
<objectAnimator
android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="1.0"
android:valueTo="0.0"
android:propertyName="ScaleX"
android:duration="2000"
android:valueType="floatType"
/>
<objectAnimator
android:interpolator="@android:interpolator/accelerate_cubic"
android:valueFrom="1.0"
android:valueTo="0.0"
android:valueType="floatType"
android:propertyName="ScaleY"
android:duration="2000"
/>
</set>
两个Fragment的代码
Fragment1的代码
package com.example.fragmentdemo;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment1 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fragment1 = inflater.inflate(R.layout.fragment1, null);
return fragment1;
}
}
fragment1.xml的代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#FFFF0000"
>
</LinearLayout>
Fragment2的代码
package com.example.fragmentdemo;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment2 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fragment1 = inflater.inflate(R.layout.fragment2, null);
return fragment1;
}
}
fragment2.xml代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#FFFF00FF"
>
<TextView
android:id="@+id/ftv2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="dsfadsfasdfdas"
/>
</LinearLayout>
小结，通过FragmentTransaction来显示和隐藏Fragment并有动画效果
代码下载