Java tutorial
/* * Copyright 2015, 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.hyperion.framework.app; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.widget.TextView; import com.google.common.base.Strings; /** * A simple {@link Activity} that shows a message. */ public class ShowTextActivity extends Activity { // The name of the extra data sent through an {@link Intent}. public final static String KEY_EXTRA_MESSAGE = "com.telenavsoftware.avengersproject.MESSAGE"; /** * Creates an {@link Intent} for {@link ShowTextActivity} with the message to be displayed. * * @param context the {@link Context} where the {@link Intent} will be used * @param message a {@link String} with text to be displayed * @return an {@link Intent} used to start {@link ShowTextActivity} */ static protected Intent newStartIntent(Context context, String message) { Intent newIntent = new Intent(context, ShowTextActivity.class); newIntent.putExtra(KEY_EXTRA_MESSAGE, message); return newIntent; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_show_text); // Get the message from the Intent. Intent intent = getIntent(); String message = Strings.nullToEmpty(intent.getStringExtra(KEY_EXTRA_MESSAGE)); // Show message. ((TextView) findViewById(R.id.show_text_view)).setText(message); } }