question: public boolean load ( String fileLocation , int type ) { if ( mHasLoaded ) { return false ; } String shaderCode ; try { shaderCode = ShaderUtils . getStringFromFileInAssets ( mContext , fileLocation , true ) ; } catch ( IOException e ) { e . printStackTrace ( ) ; mIsCompiled = false ; return false ; } mHasLoaded = true ; mShaderId = GLES20 . glCreateShader ( type ) ; if ( mShaderId == 0 ) { String msg = ( type == GLES20 . GL_VERTEX_SHADER ? "Vertex" : "Fragment" ) ; Log . e ( TAG , "Error creating shader of type " + msg ) ; return false ; } GLES20 . glShaderSource ( mShaderId , shaderCode ) ; GLES20 . glCompileShader ( mShaderId ) ; int [ ] compileStatus = new int [ 1 ] ; GLES20 . glGetShaderiv ( mShaderId , GLES20 . GL_COMPILE_STATUS , compileStatus , 0 ) ; mIsCompiled = ( compileStatus [ 0 ] == GLES20 . GL_TRUE ) ; if ( ! mIsCompiled ) { String compileError = GLES20 . glGetShaderInfoLog ( mShaderId ) ; Log . e ( TAG , compileError ) ; GLES20 . glDeleteShader ( mShaderId ) ; } return mIsCompiled && mHasLoaded ; }
target:  Load the shaders source file into a shader