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The Android Open Source Project
2009-03-03 18:28:16 -08:00
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commit d4aee0c0ca
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73
samples/ApiDemos/src/com/example/android/apis/content/ReadAsset.java
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/*
* 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 com.example.android.apis.content;
// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.IOException;
import java.io.InputStream;
/**
* Demonstration of styled text resources.
*/
public class ReadAsset extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// See assets/res/any/layout/styled_text.xml for this
// view layout definition.
setContentView(R.layout.read_asset);
// Programmatically load text from an asset and place it into the
// text view. Note that the text we are loading is ASCII, so we
// need to convert it to UTF-16.
try {
InputStream is = getAssets().open("read_asset.txt");
// We guarantee that the available method returns the total
// size of the asset... of course, this does mean that a single
// asset can't be more than 2 gigs.
int size = is.available();
// Read the entire asset into a local byte buffer.
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
// Convert the buffer into a string.
String text = new String(buffer);
// Finally stick the string into the text view.
TextView tv = (TextView)findViewById(R.id.text);
tv.setText(text);
} catch (IOException e) {
// Should never happen!
throw new RuntimeException(e);
}
}
}

92
samples/ApiDemos/src/com/example/android/apis/content/ResourcesSample.java
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/*
* 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 com.example.android.apis.content;
// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TextView;
/**
* Demonstration of loading resources.
*
* <p>
* Each context has a resources object that you can access. Additionally,
* the Context class (an Activity is a Context) has a getString convenience
* method getString() that looks up a string resource.
*
* @see StyledText for more depth about using styled text, both with getString()
* and in the layout xml files.
*/
public class ResourcesSample extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// See res/any/layout/resources.xml for this view layout definition.
setContentView(R.layout.resources);
TextView tv;
CharSequence cs;
String str;
// ====== Using the Context.getString() convenience method ===========
// Using the getString() conevenience method, retrieve a string
// resource that hapepns to have style information. Note the use of
// CharSequence instead of String so we don't lose the style info.
cs = getText(R.string.styled_text);
tv = (TextView)findViewById(R.id.styled_text);
tv.setText(cs);
// Use the same resource, but convert it to a string, which causes it
// to lose the style information.
str = getString(R.string.styled_text);
tv = (TextView)findViewById(R.id.plain_text);
tv.setText(str);
// ====== Using the Resources object =================================
// You might need to do this if your code is not in an activity.
// For example View has a protected mContext field you can use.
// In this case it's just 'this' since Activity is a context.
Context context = this;
// Get the Resources object from our context
Resources res = context.getResources();
// Get the string resource, like above.
cs = res.getText(R.string.styled_text);
tv = (TextView)findViewById(R.id.res1);
tv.setText(cs);
// Note that the Resources class has methods like getColor(),
// getDimen(), getDrawable() because themes are stored in resources.
// You can use them, but you might want to take a look at the view
// examples to see how to make custom widgets.
}
}

51
samples/ApiDemos/src/com/example/android/apis/content/StyledText.java
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/*
* 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 com.example.android.apis.content;
// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
/**
* Demonstration of styled text resources.
*/
public class StyledText extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// See assets/res/any/layout/styled_text.xml for this
// view layout definition.
setContentView(R.layout.styled_text);
// Programmatically retrieve a string resource with style
// information and apply it to the second text view. Note the
// use of CharSequence instead of String so we don't lose
// the style info.
CharSequence str = getText(R.string.styled_text);
TextView tv = (TextView)findViewById(R.id.text);
tv.setText(str);
}
}

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samples/ApiDemos/src/com/example/android/apis/content/_index.html
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<h3>Resources</h3>
<dl>
<dt><a href="StyledText.html">Styled Text</a></dt>
<dd>Demonstrates loading styled text (bold, italic) defined in a resource file. </dd>
<dt><a href="ResourcesSample.html">Resources</a></dt>
<dd>Demonstrates loading styled strings from a resource file, and extracting the raw text. </dd>
</dl>