MainActivity.java

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/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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*     http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.donebar;
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import android.app.Activity;
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import android.content.Intent;
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import android.content.res.Resources;
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import android.os.Bundle;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.ViewTreeObserver;
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import android.widget.AdapterView;
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import android.widget.BaseAdapter;
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import android.widget.GridView;
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import android.widget.TextView;
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/**
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 * A simple launcher activity offering access to the individual samples in this project.
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 */
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public class MainActivity extends Activity implements AdapterView.OnItemClickListener {
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    private Sample[] mSamples;
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    private GridView mGridView;
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.activity_main);
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        // Prepare list of samples in this dashboard.
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        mSamples = new Sample[]{
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            new Sample(R.string.donebaractivity_title, R.string.donebaractivity_description,
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                    DoneBarActivity.class),
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            new Sample(R.string.donebuttonactivity_title, R.string.donebuttonactivity_description,
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                    DoneButtonActivity.class),
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        };
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        // Prepare the GridView
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        mGridView = (GridView) findViewById(android.R.id.list);
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        mGridView.setAdapter(new SampleAdapter());
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        mGridView.setOnItemClickListener(this);
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    }
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    @Override
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    public void onItemClick(AdapterView<?> container, View view, int position, long id) {
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        startActivity(mSamples[position].intent);
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    }
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    private class SampleAdapter extends BaseAdapter {
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        @Override
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        public int getCount() {
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            return mSamples.length;
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        }
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        @Override
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        public Object getItem(int position) {
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            return mSamples[position];
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        }
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        @Override
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        public long getItemId(int position) {
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            return mSamples[position].hashCode();
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        }
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        @Override
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        public View getView(int position, View convertView, ViewGroup container) {
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            if (convertView == null) {
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                convertView = getLayoutInflater().inflate(R.layout.sample_dashboard_item,
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                        container, false);
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            }
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            ((TextView) convertView.findViewById(android.R.id.text1)).setText(
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                    mSamples[position].titleResId);
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            ((TextView) convertView.findViewById(android.R.id.text2)).setText(
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                    mSamples[position].descriptionResId);
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            return convertView;
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        }
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    }
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    private class Sample {
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        int titleResId;
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        int descriptionResId;
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        Intent intent;
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        private Sample(int titleResId, int descriptionResId, Intent intent) {
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            this.intent = intent;
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            this.titleResId = titleResId;
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            this.descriptionResId = descriptionResId;
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        }
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        private Sample(int titleResId, int descriptionResId,
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                Class<? extends Activity> activityClass) {
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            this(titleResId, descriptionResId,
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                    new Intent(MainActivity.this, activityClass));
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        }
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    }
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}