Android example source code file (LowStorageTest.java)

This example Android source code file (LowStorageTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activity, android, button, byte_size, context, exception, file, io, lowstoragetest, no_of_blocks_to_fill, object, os, override, statfs, textview, ui, view, wait_for_finish, wait_for_system_update, widget

The LowStorageTest.java Android example source code

/*
 * Copyright (C) 2009 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.android.lowstoragetest;

import android.app.Activity;
import android.content.Context;

import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import java.io.File;
import java.io.FileOutputStream;
import android.widget.TextView;
import android.widget.Button;

public class LowStorageTest extends Activity {
    static final String TAG = "DiskFullTest";
    static final long WAIT_FOR_FINISH = 5 * 60 * 60;
    static final int NO_OF_BLOCKS_TO_FILL = 1000;
    static final int BYTE_SIZE = 1024;
    static final int WAIT_FOR_SYSTEM_UPDATE = 10000;

    private int mBlockSize = 0;
    private final Object fillUpDone = new Object();

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);

        // Update the current data info
        File path = Environment.getDataDirectory();
        StatFs stat = new StatFs(path.getPath());
        int totalBlocks = stat.getBlockCount();
        mBlockSize = (int) (stat.getBlockSize());
        TextView startSizeTextView = (TextView) findViewById(R.id.totalsize);
        startSizeTextView.setText(Long.toString((totalBlocks * mBlockSize) / BYTE_SIZE));
        Button button = (Button) findViewById(R.id.button_run);
        button.setOnClickListener(mStartListener);
    }

    View.OnClickListener mStartListener = new OnClickListener() {
        public void onClick(View v) {
            fillDataAndUpdateInfo();
        }
    };

    public void fillDataAndUpdateInfo() {
        updateInfo(this);
    }

    // Fill up 100% of the data partition
    public void fillupdisk(Context context) {
        final Context contextfill = context;
        new Thread() {
            @Override
            public void run() {
                try {
                    // Fill up all the memory
                    File path = Environment.getDataDirectory();
                    StatFs stat = new StatFs(path.getPath());
                    int totalBlocks = stat.getBlockCount();
                    int noOfBlockToFill = stat.getAvailableBlocks();
                    FileOutputStream fs =
                            contextfill.openFileOutput("testdata", Context.MODE_APPEND);
                    for (int i = 0; i < (noOfBlockToFill / NO_OF_BLOCKS_TO_FILL); i++) {
                        byte buf[] = new byte[mBlockSize * NO_OF_BLOCKS_TO_FILL];
                        fs.write(buf);
                        fs.flush();
                    }

                    // Fill up the last few block
                    byte buf[] = new byte[(noOfBlockToFill % NO_OF_BLOCKS_TO_FILL) * mBlockSize];
                    fs.write(buf);
                    fs.flush();
                    fs.close();

                    // Finished, update the info
                    synchronized (fillUpDone) {
                        fillUpDone.notify();
                    }
                } catch (Exception e) {
                    Log.v(TAG, e.toString());
                }
            }
        }.start();
    }

    public void updateInfo(Context context) {
        fillupdisk(this);
        synchronized (fillUpDone) {
            try {
                fillUpDone.wait(WAIT_FOR_FINISH);
            } catch (Exception e) {
                Log.v(TAG, "wait was interrupted.");
            }
        }
        try {
            // The stat didn't relect the correct data right away
            // put some extra time to make sure if get the right size.
            Thread.sleep(WAIT_FOR_SYSTEM_UPDATE);
            File path = Environment.getDataDirectory();
            StatFs stat = new StatFs(path.getPath());
            long availableBlocks = stat.getAvailableBlocks();
            TextView freeSizeTextView = (TextView) findViewById(R.id.freesize);
            freeSizeTextView.setText(Long.toString((availableBlocks * mBlockSize) / BYTE_SIZE));
            TextView statusTextView = (TextView) findViewById(R.id.status);
            statusTextView.setText("Finished. You can start the test now.");
        } catch (Exception e) {
            Log.v(TAG, e.toString());
        }
    }
}