Programmatically load text from an asset and place it into the text view. : TextView « UI « Android

1. Android
2. UI
3. TextView

Programmatically load text from an asset and place it into the text view.

    

/*
 * 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);
        }
    }
}


//layout/read_asset.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 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.
-->

<!-- Demonstrates styled string resources.
     See corresponding Java code com.android.sdk.content.StyledText -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView android:id="@+id/text"
        android:layout_width="match_parent" android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textStyle="normal"/>

</LinearLayout>

   
    
    
    
  

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