数据库复制大小始终为3072_copymemory 最大复制3072-优快云博客

本文介绍了一种在Android应用中从资源文件复制数据库到设备的方法，并针对大于1MB的数据库提出了分段复制的解决方案。

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http://topic.youkuaiyun.com/u/20110713/08/32b55fd4-cef1-4f8b-ab13-1a3e0a693f50.html

{
	public final static String filePath = "/sdcard";
	public final static String DB_NAME = "mobilelocation.db";

	File file = new File(filePath,DB_NAME);
		
		//File file = new File( "/data/data/com.aiai.www/databases", "attribution.db");
		if(copyDB(file)){
		mSQLiteDatabase = SQLiteDatabase.openOrCreateDatabase(file, null);
		}
}
。。。。
public Boolean copyDB(File file){
		try{
		if(!file.exists()){ InputStream is = this.getResources().openRawResource(
                R.raw.mobilelocation); //欲导入的数据库
        FileOutputStream fos = new FileOutputStream(file);
        byte[] buffer = new byte[8*1024];
        int count = 0;
        while ((count = is.read(buffer)) > 0) {
            fos.write(buffer, 0, count);
        }
        fos.flush();
        fos.close();
        is.close();
        
    }

PS：在ANDROID2.3之前的版本无法复制大于1M文件，需分割复制。

参考http://mobile.51cto.com/abased-337051.htm

	//复制assets下的大数据库文件时用这个
	private void copyBigDataBase() throws IOException{
	InputStream myInput = null;
	String outFileName = filePath + DB_NAME;
	OutputStream myOutput = new FileOutputStream(outFileName);
	for (int i = ASSETS_SUFFIX_BEGIN; i < ASSETS_SUFFIX_END+1; i++) {
		myInput = this.getAssets().open(DB_NAME + "." + i);
		//InputStream ismyInput = this.getResources().openRawResourceFd(DB_NAME + "." + i); //欲导入的数据库
		
	//myInput = myContext.getAssets().open(ASSETS_NAME + "." + i);
	byte[] buffer = new byte[1024];
	int length;
	while ((length = myInput.read(buffer))>0){
	myOutput.write(buffer, 0, length);
	}
	myOutput.flush();
	myInput.close();
	}
	myOutput.close();
	System.out.println("数据库已经复制");
	}