This is an example of small Dalvik-bytecode disassembler.

Usage:
./de.py file_with_Dalvik_bytecode

Disassembler is only part of more complex project, so I've place some stubs inside this code.
I also provide some files (parts of real *.apk) for tests.

Example:
./de.py test1.dex.dat
[[0, 'sget-object v0, {type} [{class}].{field} // field@2225'],
 [2, 'invoke-virtual v0 @13970 // {class}->{method}'],
 [5, 'move-result-object v0'],
 [6, 'check-cast v0, [{type_name}] // type@0958'],
 [8, 'return-object v0']]

 Prerequisites:
 Construct Library (2.5.0) http://construct.readthedocs.org/en/latest/