/*
* Copyright (C) 2007 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.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
/**
* Entry into our redirection example, describing what will happen.
*/
public class Test extends Activity {
static final int INIT_TEXT_REQUEST = 0;
static final int NEW_TEXT_REQUEST = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Watch for button clicks.
Button clearButton = (Button) findViewById(R.id.clear);
clearButton.setOnClickListener(mClearListener);
Button newButton = (Button) findViewById(R.id.newView);
newButton.setOnClickListener(mNewListener);
// Retrieve the current text preference. If there is no text
// preference set, we need to get it from the user by invoking the
// activity that retrieves it. To do this cleanly, we will
// temporarily hide our own activity so it is not displayed until the
// result is returned.
if (!loadPrefs()) {
Intent intent = new Intent(this, RedirectGetter.class);
startActivityForResult(intent, INIT_TEXT_REQUEST);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == INIT_TEXT_REQUEST) {
// If the request was cancelled, then we are cancelled as well.
if (resultCode == RESULT_CANCELED) {
finish();
// Otherwise, there now should be text... reload the prefs,
// and show our UI. (Optionally we could verify that the text
// is now set and exit if it isn't.)
} else {
loadPrefs();
}
} else if (requestCode == NEW_TEXT_REQUEST) {
// In this case we are just changing the text, so if it was
// cancelled then we can leave things as-is.
if (resultCode != RESULT_CANCELED) {
loadPrefs();
}
}
}
private final boolean loadPrefs() {
// Retrieve the current redirect values.
// NOTE: because this preference is shared between multiple
// activities, you must be careful about when you read or write
// it in order to keep from stepping on yourself.
SharedPreferences preferences = getSharedPreferences("RedirectData", 0);
mTextPref = preferences.getString("text", null);
if (mTextPref != null) {
TextView text = (TextView) findViewById(R.id.text);
text.setText(mTextPref);
return true;
}
return false;
}
private OnClickListener mClearListener = new OnClickListener() {
public void onClick(View v) {
// Erase the preferences and exit!
SharedPreferences preferences = getSharedPreferences(
"RedirectData", 0);
preferences.edit().remove("text").commit();
finish();
}
};
private OnClickListener mNewListener = new OnClickListener() {
public void onClick(View v) {
// Retrieve new text preferences.
Intent intent = new Intent(Test.this, RedirectGetter.class);
startActivityForResult(intent, NEW_TEXT_REQUEST);
}
};
private String mTextPref;
}
/**
* Sub-activity that is executed by the redirection example when input is needed
* from the user.
*/
class RedirectGetter extends Activity {
private String mTextPref;
private TextView mText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.row);
// Watch for button clicks.
Button applyButton = (Button) findViewById(R.id.apply);
applyButton.setOnClickListener(mApplyListener);
// The text being set.
mText = (TextView) findViewById(R.id.text);
// Display the stored values, or if not stored initialize with an empty
// String
loadPrefs();
}
private final void loadPrefs() {
// Retrieve the current redirect values.
// NOTE: because this preference is shared between multiple
// activities, you must be careful about when you read or write
// it in order to keep from stepping on yourself.
SharedPreferences preferences = getSharedPreferences("RedirectData", 0);
mTextPref = preferences.getString("text", null);
if (mTextPref != null) {
mText.setText(mTextPref);
} else {
mText.setText("");
}
}
private OnClickListener mApplyListener = new OnClickListener() {
public void onClick(View v) {
SharedPreferences preferences = getSharedPreferences(
"RedirectData", 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("text", mText.getText().toString());
if (editor.commit()) {
setResult(RESULT_OK);
}
finish();
}
};
}
//main.xml
android:gravity="center_horizontal"
android:layout_width="match_parent" android:layout_height="match_parent">
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingBottom="4dip"
android:text="redirect_main"/>
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingBottom="4dip" />
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="clear_text">
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="new_text">
//row.xml
android:gravity="center_horizontal"
android:layout_width="match_parent" android:layout_height="match_parent">
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingBottom="4dip"
android:text="redirect_getter"/>
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingBottom="4dip">
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="apply" />