samples/SupportAppNavigation/src/com/example/android/support/appnavigation/app/ContentViewActivity.java

/*
 * Copyright (C) 2012 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 com.example.android.support.appnavigation.app;

import com.example.android.support.appnavigation.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.support.v4.app.ShareCompat;
import android.support.v4.app.TaskStackBuilder;
import android.text.TextUtils;
import android.view.MenuItem;
import android.widget.TextView;

public class ContentViewActivity extends Activity {
    public static final String EXTRA_TEXT = "com.example.android.appnavigation.EXTRA_TEXT";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.content_view);

        ActionBarCompat.setDisplayHomeAsUpEnabled(this, true);

        Intent intent = getIntent();
        if (Intent.ACTION_VIEW.equals(intent.getAction())) {
            TextView tv = (TextView) findViewById(R.id.status_text);
            tv.setText("Viewing content from ACTION_VIEW");
        } else if (intent.hasExtra(EXTRA_TEXT)) {
            TextView tv = (TextView) findViewById(R.id.status_text);
            tv.setText(intent.getStringExtra(EXTRA_TEXT));
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            Intent upIntent = NavUtils.getParentActivityIntent(this);
            if (NavUtils.shouldUpRecreateTask(this, upIntent)) {
                TaskStackBuilder.from(this)
                        .addParentStack(this)
                        .startActivities();
                finish();
            } else {
                NavUtils.navigateUpTo(this, upIntent);
            }
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}