implements AdapterView.OnItemSelectedListener : AdapterView « UI « Android

1. Android
2. UI
3. AdapterView

implements AdapterView.OnItemSelectedListener

   
/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package app.test;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class Test extends Activity implements AdapterView.OnItemSelectedListener {
    private static final String[] INTERPOLATORS = {
            "Accelerate", "Decelerate", "Accelerate/Decelerate",
            "Anticipate", "Overshoot", "Anticipate/Overshoot",
            "Bounce"
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Spinner s = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item, INTERPOLATORS);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        s.setAdapter(adapter);
        s.setOnItemSelectedListener(this);
    }

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
        final View target = findViewById(R.id.target);
        final View targetParent = (View) target.getParent();

        Animation a = new TranslateAnimation(0.0f,
                targetParent.getWidth() - target.getWidth() - targetParent.getPaddingLeft() -
                targetParent.getPaddingRight(), 0.0f, 0.0f);
        a.setDuration(1000);
        a.setStartOffset(300);
        a.setRepeatMode(Animation.RESTART);
        a.setRepeatCount(Animation.INFINITE);

        switch (position) {
            case 0:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.accelerate_interpolator));
                break;
            case 1:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.decelerate_interpolator));
                break;
            case 2:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.accelerate_decelerate_interpolator));
                break;
            case 3:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.anticipate_interpolator));
                break;
            case 4:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.overshoot_interpolator));
                break;
            case 5:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.anticipate_overshoot_interpolator));
                break;
            case 6:
                a.setInterpolator(AnimationUtils.loadInterpolator(this,
                        android.R.anim.bounce_interpolator));
                break;
        }

        target.startAnimation(a);
    }

    public void onNothingSelected(AdapterView<?> parent) {
    }
}

//main.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2009 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:padding="10dip"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clipToPadding="false">

    <TextView
        android:id="@+id/target"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="26sp"
        android:text="animation_3_text"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dip"
        android:layout_marginBottom="5dip"
        android:text="animation_2_instructions" />

    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

   
    
    
  

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